Ichika has long been in love with his older brother. She often had intimate actions with onii-chan that made him unable to help but fantasize about being able to massage that beautiful butt. One day Ichika was confessed to by a tall, handsome, kind male classmate. But because she loved Onii-chan, she couldn't accept his confession. To avoid being embarrassed every time they met, she didn't know how to answer him. He didn't give up and wanted Ichika to answer. Ichika decided to tell him that she loved onii-chan so that he would give up hope. Knowing Ichika's weakness, he wanted her to satisfy him. Ichika's Onii-chan also witnessed this and when he got home, seeing that gorgeous butt again made him unable to control himself and do something unforgivable...