Konya, Ore no Heya ni Tomareba?

Kurusu Miyabi, a cheerful and popular college girl, had a crush on Shibasaki Toshi, a cool, handsome loner. However, due to a certain "problem," Miyabi felt like she was incapable of a normal relationship. Until on a rainy night... her honey overflowed as she was penetrated. Their twisted relationship continued even as they piled up misunderstandings in spite of their intimate physical relationship.

(Source: Komitsu Ekusutashii 120%, translated)