https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_675789/

It's BSS, thus Netorare tag.

Yamamoto has a crush on his friend's mom, Eriko, while Tanaka brazenly says he will lose his virginity to Eriko, after her son Miyata couldn't go to school that after Yamamoto and Tanaka took their time to get him, he had a cold. Yamamoto just brushes it off as one of Tanaka's stupid ideas that never follow through, but to his surprise Tanaka soon comes to his house to tell the story about how he lost his virginity.

Tanaka tells how he hooked Eriko with sending her videos of him masturbating several times, every single day, just brazenly begging her to take his virginity; Yamamoto can't believe this nonsense but Tanaka says it is true, and Eriko actually agreed to meet with him, in her mind it was to make Tanaka stop sending her those messages but the guy was pushy from the get go, repeatedly saying thank you for having him, as he was casting a little spell Yamamoto thinks. Eriko fell for her urges, she hasn't had for 10 years so she had to see Tanaka's insane vigor and large penis in person.

Tanaka and Eriko are go at it, Tanaka brags to Yamamoto but he can't believe it is true; later on Eriko tries to cut ties with Tanaka, saying she was just sexually frustrated but this can't go on, that is betraying her husband and son Miyata, but a furious Tanaka won't let it go, he manages to push Eriko for more sex and now films everything, wanting her to get pregnant, while filming it he dares her not have his baby otherwise he will show the videos to her husband and son; Eriko is pleading for Tanaka to stop but she loses to lust, following with lying to her husband she is extending her stay at a friend's house.

In the end Yamamoto then asks for all these pics and videos if Tanaka's story is true, but now he just scoffs at him, saying that he should write a story about these encounters. With no concrete proof Yamamoto is left wondering as he sees a pregnant Eriko later, still having a crush on her, hoping he would impregnate someone like her someday, in blissful ignorance of what Tanaka told him is actually true.

Base +10, GypsyBastard +6, Senpai SAP +5, Falconartist +6, nuts987 +14

[Synopsis]

Yamamoto-kun secretly has a crush on his friend Miyata-kun's mother.
One day, his friend Tanaka claims he had sex with Miyata-kun's mother and begins to tell him the whole story.
But what is the truth behind it all...?

Base +28, Senpai SAP +5, nuts987 +14