Sister tyranT ~Jitsu Ane Kuppuku Choukyou~

Ryo is a sheepish boy and younger brother of beautiful and inteligent girl Iori. He is bullied by Iori almost everyday, hating her so much. One day, he finds a diary of Iori in her room. From what is written in the diary, Ryo learns she has a desire to be humiliated.....