Brothers Conflict

The large, blended family of sister and brothers 1/13 are celebrating Christmas and Valentine's day. If seven brothers in love wasn't enough, an eighth and a ninth, the youngest, also swoon and wants the lovely new addition to eat his honmei chocolate...

Ema finds a special lamp that her father left for her. Ema and the brothers rub the lamp to find that something peculiar happens in front of them.

Junior High student Nao's brother complex is so strong, it's almost at the point of incest. She's determined to make her brother, High School student Shuusuke, see her as a woman. So determined, that she goes as far as going into his room to throw away all his non-incest related porn. But as she's looking for his porno stash, she finds a photo album... and she's not in any of his childhood pictures. What is going on?

The story involves two pairs of teenage elder sister and younger brother, Niimoto's who are a bit of narcissist and Saitou's who look a bit mysterious, and their everyday life in school and at home.