Koakuma-chan no Yuuwaku!

The protagonist, Otonashi Sumiya, and the heroine, Suzumori Mei, have known each other since childhood. Their houses are next to each other, and they have grown up together as if they were brother and sister. But their relationship changes drastically when Mei confesses her feelings for Sumiya. "Erotic temptation". She began to make sexual advances toward him at every opportunity. "I