"Please...just stay close to me." Chiai, an ordinary high school girl, has a good-looking childhood friend, Ai, who is a scion of a big company. Chiai thinks that Ai is like a younger brother to her, who always spoils her. But the true nature of this cute childhood friend is that he is a doting, possessive man who will do anything for Chiai...? A love affair with a childhood friend all to himself!