Nanase-chan, the younger sister of a cute glasses girl who has a sweet voice and is a little selfish. Nanase who hugs his brother on the bed and asks for his body, saying, "Hey, let's play, brother...". At first, he was a confused older brother, but he was pestered by his cute sister and exploded the feelings he had suppressed for his sister until now. An uncool story of a brother who has seeding sex with his cute and obedient sister and a sister who accepts it