るるるとささらの先生☆教えて～ボクは女のお坊っちゃま～

あらすじ

Yasuhiko is hired as a home tutor of Rururu during summer vacation. At first, Yasuhiko thinks Rururu is a boy. Rururu is smart and there is nothing he can teach. But he later finds out Rururu is a girl. The problem is Rururu is brought up as a boy, so he has no sex knowledge. Now, his mission is to give him sex lessons.