Iinchou no Himegoto(2008)

Iinchou no Himegoto

Ayano, the sports-committee chairperson, accidentally got drunk at the after-party of the sports festival. Next morning, when she came to, she finds herself in Kagura-Kun's bed! And she's only wearing her undergarments?! Kagura-Kun, her classmate, is also is the 10th heir of the infamous Kagura-gumi gang. Feeling anxious about getting in bed with such a dangerous guy, what should Ayano do?

(Source: Sho-Comi, translated)