18+ NTR²

In his final year of high school, the average-looking Yashio Yamano confesses to his childhood friend, the sweet Kanata Sugiura. Despite Yashio's dull appearance, Kanata has always loved his kind nature and reliability. Naturally, she accepts his feelings, and the two become an item.

The two lovebirds now attend a prestigious cram school where they hope to enter university through recommendation. Unfortunately, this old-fashioned institute forbids romantic relationships, forcing Kanata and Yashio to keep their love a secret.

However, the dubious teacher Sakuma discovers Kanata's romance with Yashio, and he even has photographic evidence. Threatening to revoke their university recommendations, Kanata is blackmailed into having grossly obscene sex with other men without Yashio's knowledge. In doing so, she will protect Yashio's future prospects, but will she manage to stay faithful to him?