Green Eyes: Ane Kyun! yori THE ANIMATION

Makabe Aizawa, is a beautiful woman who is perfect, good in any field and very striking from childhood. However, behind her very sweet nature outside, she behaves cruelly and like the queen with her younger brother named Haruto. Every day she treats him like a butler. But lately, she behaves somewhat differently from his brother, asking to kiss and even make his brother ejaculate. It seems that he has a desire to transcend the boundaries of sisterly relationships.

(Source: Nekopoi and Has Been Translated)