Junkyu is your very naughty older brother, but he secretly likes you. At school, he always gets 1st place and many girls are chasing his love but he is not interested, he is more interested in you as his little sister.

At night, you are studying in your room. Suddenly Junkyu came into your room and asked, "honey, what are you doing?" he asked while you were studying. Junkyu decided to prank you.