Doujinshi

Sadamichi Imada has always dreamed of teaching at an all-girls school—a wish that comes true when he's transferred to Kurosugi Girls Academy. But there may be a teeny-tiny problem... his class is packed with nothing but bronzer-abusing gyarus! He barely has time to process a decade of gyaru-inflicted PTSD before problem student number one—the bubbly (and low-key horny) Mariko Kuroi solicits him for a quicky after school, and the other girls are quick to follow! Can Imacchi be professional in these uncharted waters teeming with thirsty thots, or are they going to drag him down with him!?

Takeshi Takasaka is a boy completely absorbed in video games, even on New Year's Day. His childhood friend, the one-year-older Reina Kagurazaka, is a selfish and spoiled girl.  When she invites him on a date (disguised as a New Year's visit to the shrine), he's completely unresponsive. Furious at his indifference, she challenges him to a fighting game match with an outrageous condition: "The loser must do whatever the winner wants."  As expected, Reina suffers a crushing defeat... and her chastity is the forfeit.

Super Scary Senpai who's only nice to me...