Ai Shimai - Tsubomi - [OVA]

Two sisters, Miyatsuji Kotono and Suzuyo, attend Ikaruga High school, where their mother Kasumi is the leader of the trustees. The beautiful girls adore Kaneshiro Shoichi. However, Kaneshiro is captivated by the school doctor’s, Morisawa Maiko, body and only cares about her.
Morisawa lures Kaneshiro into breaking into the principal’s office and stealing the data disk containing the exam questions as Kaneshiro will be expelled from the school if he doesn’t pass the examination.