Kanojo ga Kare ni Ochiru Riyuu Manga

By: Nanao Mio and

Also known as: 她愛上他的理由; 彼女が彼に落ちる理由; Kanojo ga Kare ni Ochiru Wake

From Intercross: After school, being hit upon by a younger, obnoxious man. ...But, somehow, when alone with him, I easily become nervous. What if, such a kouhai suddenly kisses--? "It's frustrating to find myself falling in love with you" "That's just useless struggling"