are these screenshots? Would be great if you could upload the full quality version. Thanks for sharing

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Since there is no way to download it, I have to use screenshots instead.

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@悠真l 在论坛有教如何提取DMM的图，请看此贴https://forums.e-hentai.org/index.php?showtopic=92167

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@悠真l
You can ask for help on the forum, check the link they gave you

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感谢分享

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原來有教學啊

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To combat the declining birthrates a special sexual education program was implemented all over Japan, in all highschools, where students will partake in practical lessons with select partners on a weekly basis to analyze and decide their best suited partners; Yuki Ono is the average unremarkable protagonist who recounts how unique his situation is, you see he is childhood friends with Azusa Sasaki, she used to be such a shy little girl back in middle school that even a guy like him seemed like a protector when they were young.

Yuki fell in love with Azusa in due time, once he feared they would grow apart the older they got Yuki took the chance to confess, Azusa was so surprised, she also loved him, all is great so they became a couple. Azusa grew up to be a changed person, she became very extroverted in highschool, a gyaru of sorts, Yuki tells himself how lucky he is Azusa never stopped loving him, they're still a couple despite him remaining unremarkable while she became so lively; what's more both Asuza and Yuki never trade partners for the mandated sexual education program, they really want to keep their love only to each other, Yuki believes all is fine once yet again he climaxes and asks Asuza if she felt good, yes of course she says, it was great... but in Azusa's private thoughts she admits to not even knowing what feeling great with sex is supposed to mean, she read all about orgasming and heard her gyaru friends talking about how awesome their different partners made them feel, but with her dear Yuki she can't say the same? Azusa is a little down but she believes their love is above such superficial and primal sensations.

However, once Yuki and Azusa are called by their teacher to talk about their latest results they get chastised, the program has its members track their sexual compatibility through an App, and this time their results were really bad, only 31% percent, their teacher says this is not acceptable, they aren't allowed to insist in refusing to trade partners until their scores improve, Azusa gets angry and tries to put her feet down, she doesn't believe some dumb app can just score their compatibility like that, it is surely bugged, she believes her compatibility with Yuki is perfect! but the teacher just shrugged Azusa's tantrum off, thus both Yuki and Asuza will be placed under remedial classes where Top Scoring Sex Ed students themselves are assigned to assist failing students, and of course the honors student in this subject is the usual prime Gyaru-oh, their Senpai (unnamed) will guide Yuki and Azusa separately to teach them how to improve their sexual prowess, hopefully it improves their compatibility score.

Yuki is a little worried, he recalls an once gloomy girl, referred to as just "N-chan", that was also forced to take remedial classes, after her term ended she became a whole new person that loved sex and openly seeked with anyone and wherever; Azusa notices Yuki's worried expression, as if she could tell what he is thinking so she tries to reassure him their bond cannot be broken, whatever Senpai does to her won't change what she fells about Yuki, once these remedial classes everything will be fine and Azusa and Yuki will go back to doing with only each other... Senpai takes Azusa to his place, he will start the "class" right away, since he knows Azusa only did the special class with Yuki only he automatically faults Yuki for being unable to make Azusa know how amazing sex can be, no worries though Senpai says he will fix that, meanwhile Azusa express repulsion in her throughts over Senpai's messy room and his careless harsh words over Yuki not being able to please her and Azusa herself for insisting on laying only with Yuki, she is sure to resist him, Azusa will not let Senpai take control during sex.

It doesn't take long for Senpai to do his thing, Azusa is trying to bear it but she can tell right away Senpai's touch is completely different to Yuki's, then a school mate of Azusa drops with a guy to get some fuck too, apparently that is common hang out for remedial classes, which is to say it is a fuck room, the girly teases Azusa about what's up with refusing other partners other than Yuki lol? Azusa claps back, this is just a remedial class, this was forced upon her, back off! Whatever, her girl friend just enjoys sex with her guy, but even she can tell Azusa is having a great time with Senpai, it is making her hot from watching them while she too takes some dick. Azusa on the other hand still tries to bear it, but she is slipping, Senpai tried to take a kiss to make her feel even better, she refused, but once he tries again Azusa's mind is on cloud nine, she doesn't refuse it now and so Senpai finishes inside her, Azusa can't believe this, it felt insanely good, a juxtaposition is made where one frame shoes Azusa faking feeling good to make Yuki happy, while the other frame shows Azusa now completely overtaken by her orgasms, it truly felt good to the point Azusa blanks out in her spasms.

Azusa's girl friend teases her, did it feel that great, hey? Azusa can't answer, so the cheeky girl takes Azusa's phone without permission to take a look at the sex compatibility app, whoa she is shocked at such a high percentage (but it isn't shown to the reader), all of this from their first encounter? The girl devilish opens her mouth to say Azusa should just break up with Yuki and date Senpai instead, she gets giddy at wondering how much Azusa would skip class to fuck Senpai all the time, heh heh, but it's not like Azusa can hear it, but Senpai can, and surprisingly he scolds Azusa's girl friend as he comically karate chops her head, this is just a remedial class, he isn't taking anyone's girl, shush it! Now Senpai says he will take care of Yuki, time for his remedial class.

Two weeks have passed, it seems Senpai oversees only one at a time, in set intervals, now Yuki is at the beach, in his mind he faults himself for he and Azusa taking these remedial classes, he has grown insecure over remaining an unremarkable dude while Azusa became someone he now thinks may be above his league, he can tell deep down Azusa was putting up with him out of love, he couldn't please her as much as she told him he could; shit Yuki thinks, he doesn't like Senpai either, well, used to, because now at the beach Senpai is actually taking Yuki under his wing like a little bro? Yes, Yuki now thinks Senpai might be a good dude, he is trying to teach Yuki how to hook up with girls, how to be a desirable male, Yuki gotta fuck them girls the proper way, with proper training Senpai claims any girl can and has submitted herself to him, Yuki goes along the ride, even bonking a girl Senpai scored for him, watch and learn from Senpai.

Afterwards Yuki and Azusa are together having a conversation, Azusa is quite restless she says, Yuki ask her why, Azusa then vents on Yuki about the talks she had with her school mates in-between remedial classes, how they are all causally talking about fucking some more, maybe even try some new things you know? They invited her to a threesome, she refused, Azusa says that pisses her off, these remedial classes are supposed to be bad, why are these loose bitches acting like it is a good time? Yes, Azusa still is trying to hold onto a thread here, she failing for Senpai's touch hasn't completely taken her mind yet, but as Azusa tells Yuki this she clearly is fighting her own body, pinching her nipples with her chopsticks without even noticing, Azusa is ironically aroused while bad mouthing her debauched classmates, thus Azusa drops some clear hints to Yuki once she asked him to skip class with her and go somewhere else... but Yuki foolishly doesn't take the hints, he thinks Azusa's cold sweat and hot touch means she is feeling ill, she probably should go rest, Yuki doesn't understand Azusa's immediate reaction once she hears her own boyfriend telling her to go somewhere else by herself, she puts a cold expression and leaves, Yuki wonders if there was something he missed? Yuki tries to contact Azusa so they can go to the bakery she wanted to visit on their way home, but Azusa doesn't answer, he wonders if she really left back then to go directly home... all the while the scene ominously frames towards the door where the Sex Ed classes take place... Yuki didn't notice it as he passed by...

Another two weeks have passed, oddly Yuki remarks he hasn't seen Azusa much since that missed opportunity to go the bakery, also he took the time to follow Senpai's footsteps, Yuki started working out and took an all-around improvement mindset, he wants to become a man who makes Azusa fold in absolute pleasure, he really wants to see how Azusa looks while completely overtaken by sexual bliss, well, the remedial classes are over and it is time to resume the practical sex ed classes, Yuki is eager to be with Azusa again, hoping their score will be higher this time around... going towards the designated place for they used to have their practical classes Yuki is so ready to get back with his girlfriend but a shocking turn of events has happened, Yuki is met with a shocking sight once he opened the door, Azusa is having the time of her life with Senpai in their recurring sex ed bed!?

An abrupt fade to black took place, as if to mirror Yuki's mind shuting down, in which he seemly took his pants off in anticipation to have sex with Azusa but the shocking sight made him cum. Presumably in despair Yuki turns silent, only Azusa and Senpai speak for the moment, she is not even shocked at Yuki catching her with Senpai, she is merely surprised at Yuki just cumming already, Azusa causally says she wishes Yuki can get up again quick so she will do with Senpai in the meantime, no biggie, she will wait, hah, Senpai interjects, calling out Azusa for actually expecting Yuki to catch them in the act, she denies it, Azusa tries to deflect she only hoped Yuki could use what she is doing with Senpai as a reference to do it himself later... If I didn't make it clear enough Azusa here is acting under servere disassociation, she is under the impression what she is doing right now isn't wrong per se, absolute denial.

Nope, Senpai nudges Azusa to be honest, and also chastised Yuki for failing to keep Azusa within his grip, didn't Senpai take his sweet time to teach Yuki how to make girls feel? Azusa had been seeking him every day for the past two weeks during the last days of the remedial classes, and even today after it was was over; Senpai is disappointed so he tells Azusa do with Yuki next, the remedial classes are over so Yuki should be her partner right? Azusa slips into a little honesty and says sorry to Yuki, she will suck him off and so he can get hard again, heh that's more like it Senpai says, how about Azusa open herself all out and tell Yuki about the day she first seeked Senpai beyond the remedial class? Azusa is a little reluctant but if that makes Yuki hard again she will say it, but Yuki still hasn't said a thing, Azusa is assuming here.

The same day Azusa threw those desperate hints that Yuki failed to catch she rushed to the restroom to masturbate furiously, hoping her frustration would subside, but to no avail, and in what seemed like a perfect bad coincidence Senpai was keeping track of Azusa that day, he followed her to the restroom stall and forced himself on her, Asuza would claim that as rape but he immediately made her feel so good that she had not taken that as rape. Azusa unveils that recollection as she stops sucks Yuki off to then free her mouth, she uses her hands to please his dick instead, Azusa bares it all, she could not pretend to hold on her wishes to save herself for Yuki anymore, Azusa now truly apologizes to Yuki, fully admitting she has become a sex addicted monkey like all the classmates she bad mouthed before, Azusa thinks Yuki must hate her now, right? She resumes sucking his dick once this recollection ironically makes her even hornier, now after spending whole pages without saying anything, Yuki can only mister a single phrase, he is he is cumming! Azusa is suprised at Yuki's sudden reaction, she can feel him cumming in her mouth...

Another abrupt cut, Yuki had seemly passed out once he came in Azusa's mouth, he wonders where he is, oh that's right, he remembers, he caught Azusa and Senpai willingly having sex outside the remedial classes and then passed out once Azusa played with his dick... Yuki looks to the side, Asuza and Senpai are still at it, what's more, they are completely immersed in their own little world, as if they forgot Yuki was even there once he was nicely put to bed, Azusa and Senpai are just casually speaking about where it feels good so he should pierce her there, yeah lol, won't you immediately pass out when I do it here, heh heh, that type of thing. Yuki then finishes this story as he looks at Asuza, narrating a defeatist tune: an ecstatic face he never saw her do, sounds he never heard her make, yet more than feeling frustrated Yuki can only think he is jealous of how much they perfectly devour each other... Senpai just casually claims Azusa loves sex, lol, YES! she openly agrees, and so it is finally revealed Senpai and Azusa's compatibility percentage: 92% a cum stained screen shows, THE END.
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How curious, I would have ignored this completely, thus not even writing this overview, were not for the little story beats I found it strange yet curious, I mean, the unnamed Senpai is portrayed as more of an opportunistic netorare guy than an outright evil netorare guy; Senpai was doing his job as the remedial class instructor and even reprimanded Azusa's mate for suggesting she breaks up with Yuki, Azusa losing herself to pleasure and Yuki being a clueless bloke when Azusa was desperately hoping for his touch led Senpai to see some free real state and let himself in, that doesn't make him a good guy, far from it, but he is not as evil as he could be when compared to other Gyaru-oh dudes in other netorare works.

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感谢分享，牛子之神感谢你

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说是相性，其实是母勾被艹爽了

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现在的你，是真正的英雄

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感谢分享，求大佬后续更新高清版本，多谢

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