Kakyuusei 2: Ki Hanashi Atsumari - Season 1

Ryoma and Tamaki are childhood friends whose relationship involves sex without romantic commitment. The situation escalates when Tamaki, angered by Ryoma's failure to use contraception, declares their arrangement over. Forced to interact through a shared club, their continued coldness prompts a third party, Yuri, to attempt reconciliation. Yuri, however, is unable to conceal her own feelings for Ryoma and confesses her love to him, leading to an intimate encounter between them.