Ojousama no Renai Jijou

Kaya is the true model student: beautiful and rich, but modest, outgoing, but prim and proper. This is a mask, however, as at her heart, she's a massive pervert. Carrying this mask all the time is causing her stress to build up, but she connects with Takasaki, a part-time teacher at her school and starts a relationship that allows her to release her stress.

Today will be the last day Takasaki is teaching at her school, so he prepares a special parting gift for her...

(Source: 2D Market)