Oh right, the main girls had boyfriends, meaning it was netorare!? So TLDR both are sluts at this stage, the first boyfriend Shuichi is cowardly and runs for having an erection while Wakaba was just getting into it, he goes to the toilet and the magical teacher teleports where she is to fuck her, after the teacher is done she returns and goes bold on her bf Shuichi gives him a BJ and even eats his ass as he questions how she is good at this and she says she watched porn videos about it because she knows boys like that but after cumming she asks why MC isn't getting hard again, MC is serious and asks her she's changed a lot, she is on the verge of tears as she smiles. Then it switches to the other couple Maika and her BF Shouta. He asks if she is free for today because they haven't been together for a while but she excuses herself saying she has extras class because teacher Mashida asked her to, he laments he'll have to wait and goes to the gym but ends up finding Maika and Mashida having sex, stands there watching and gets a hard on, he tries demanding an explanation and she panicks saying isn't what it looks like and Mashida somehow gaslights her BF into being the culprit for the situation for the school triip (lmao) he ultimately ends becoming a cuck as both tell each other "Ilove you" as the teacher cums raw inside Maika.
The plot here is minimal and not much to think about to be fair.
Nashida isn’t just “gaslighting”, he is actually still blackmailing both Wakaba and Maika even though they are more willing sluts that easily do his bidding by now. This whole mess started with Wakaba, Shuuichi, Maika and Shouta getting caught together in the dorms during the school trip, Nashida being a piece of shit teacher threatened to suspend all four for hooking up at the dorms, Maika and Wakaba pleaded Nashida to please not ruin both Shuuichi and Shouta’s blooming career in the baseball team, thus Nashida took both Maika and Wakaba ever since across the series.
The third chapter developed Wakaba and Maika into completely willing sluts, not even thinking about why they gave themselves to Nashida in the first place, they just enjoy it by then; however, the fourth chapter here tries to backtrack a little on their degeneration with making both girls appear a little more guilty again to be still doing this; Nashida actually followed Wakaba and Shuuichi for their date, with the absurd notion that he has to keep tabs on irregular relations between students beyond school grounds, Wakaba didn’t expect that and pleaded for Nashida not to ruin her date, being told by Shuuichi she has changed a lot seems to have weighted more on her guilt, hence Wakaba’s teary expression.
With Maika she is more willing still but getting caught by Shouta breaks her, as she tries to exasperatedly claim this is not what it looks like, which makes Nashida confirm his blackmail is very much up, Maika better lay with him or Shouta (and everyone else) gets suspended, that’s where Nashida gaslights Shouta by saying this is all his fault, he dared to break school rules on boys and girls mingling on the dorm now Maika has to pay the price, and now that Shouta caught them Nashida is bold enough to demand Shouta masturbate to him doing Maika like a good cuck or else he is going to get suspended anyway, Shouta stops blaming Maika and does what he is told; both in tears Maika and Shouta swear their love to each other, THE END. ----------------------------------------------------------------------------------
Dunno what went through Nibo Niboshi’s mind to portray Wakaba and Maika back to how they used to be in the 2 first two chapters, maybe he didn’t think the girls being completely willing to be under Nashida’s thumb made a compelling netorare scenario anymore, if they have no guilt then there’s no more tension I guess.