Chijin no Koi by Nayuna Sakurano

A collection of yaoi short stories. In one, an art teacher becomes involved with a talented student, even though he suspects the student loves him only as a model. In a two-parter, art student Katsura wins the silver prize in competition while Kayama, the son of a brilliant artist, achieves merely an honorary mention. Katsura sneaks a peek at the other's sketch book, which reveals Kayama's incredible talent. Katsura asks Kayama why he hides his talent. Kayama offers to tell if Katsura will have sex with him. In part two, Kayama believes Katsura prefers Kayama's talent to Kayama himself, so he mangles his own hand to force the issue.

Yaoi manga for sale at Mangaroo.