First doujin by artist Popenisuta, who also does commercial work with Comic Bavel

https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_641552/

Artist twitter: https://x.com/omoitsukin/

Synopsis

A teacher who can't forget his first love, somehow finds himself attached to his trouble-making student, Minase Rion. He's aroused by her resemblance to his first love, and he can't control his desire, so they end up having sex.

The next day he's filled with regret, but Rion's seduction makes him lose his inhibitions, as the two engage in repeated sexual encounters. Then, a familiar looking woman appears before the teacher ...