"Bijin de Okane Mochi no Kanojo ga Hoshii" to Ittara, Wake Ari Joshi ga Yattekita Ken.

Iori Shino (virgin) is engaged to Tendo Tsukasa, a celebrity on campus, because of an unintentional comment he made. However, Tsukasa was a rich and undeniably extremely beautiful girl who was rumored to "sleep with anyone" At first, Iori was bewildered by the difference in knowledge and experience. But gradually, he is drawn to her unexpected side... Opposites in love, they question the meaning of love! A slightly mature coming-of-age romantic comedy! (TL from: comic-walker/nicovideo)