18+ Learning the Hard Way

Bullied ruthlessly by girls in high school, Jinhoo's done his best to put his past as a complete loser behind him. However, one day, he finds out that his newest tutee is his ex-bully, Yejin! Despite flunking the college entrance exam twice, Yejin's only interested in her dildo and is adamant that she doesn't need a tutor. However, as she starts to torture Jinhoo as per usual, Yejin realizes that there are some things that Jinhoo can teach her...but they're going to have to find out the hard way.

(Source: Lezhin Comics)