[Machine Translation] One night, Natsumi comes home to find a strange boy in her room! Natsumi is surprised but does not tell him her name. As soon as she calls him "Mikan", after his orange hair color, she loses consciousness. After a while, she wakes up with a pleasant sensation and the heat of her body, only to find that she is being sucked by a strange young man! He is a "tangerine" who became an adult by eating Natsumi, and his true identity is that of a "demon! It seems that when he loses his energy, he turns into a child, and in return for naming him "Mikan", he wants a physical relationship with her...?