Aneimo -Triangle Lovers- (2008)

Takumi lives next to Mitsuki and Satsuki's house. They have been good friends since they were kids, going shopping and skiing together. One day, Kazuyoshi, Takumi's father, brings two girls, Saori and Yui, back to their house, and accepts them as new family members. At first, he is confused, but gradually becomes closer to them.