Kurotaki Buchou no Inokori Shidou

The new swim club captain, Kurotaki, is a strong-willed senior who treats members harshly. Members summoned by her were rumored to quit within a week, but when the protagonist was called after practice, what awaited him was a sexual partner! After grueling practice, he endured daily sex with the captain, getting worked over... but after the break, he was summoned by the senior again after school...!

(Source: Mujin Comics, translated)

Note: Published in Comic Mugen Tensei 2024-12