Adult PC Game: Amaenbo - Futago Mama to H na Natsuyasumi by Rapapuru Archive

Yuka has a beautiful mother, cheeser. As it works full time, Mine, her younger sister, cares about him and Naoto, his youngest brother. On one day, Yuki receives a letter from a girl. When during lunch, he speaks about it, Miina says, "Do you love this girl? Who is she? Please tell me later!" Yuki says, "Well, okay ...." He is always embarrassed when Miina asks him about it .... why ...?