Shidou Reiji

The protagonist and elder brother of Riina. He's a lolicon who loves the young girls around him. He has a collection of 'questionable' pornography featuring underage girls that he enjoys watching.

During the summer he's asked to watch over his sister while their mother is gone on business for 12 weeks. His friend Suzuhara Heiji asks him to also watch over his sister Miko while he's away. Because he's a lolicon it's not long before he has sex with the little angels in his care.