Naruto Wataru is a prominent student that belongs to the art club of his school and is the inheritor of a large fortune. Kachiwagi Chikako, Naruto's friend and long time admirer suddenly learned that Naruto had a key of an hotel. Chikako and her inseparable best friend Tateba Tomone try to find out just what is that key supposed to be for.
Once they investigate, they realize that it's the key for a Love Hotel room, and furthermore Naruto is outside the hotel with Wakatomi Hatoko Sensei who tutors Naruto; at first they are appalled upon seeing the facts, however Hatoko Sensei guarantees that nothing suspicious is going on, the room of the Hotel is actually Naruto's private studio and second home but the fact that every draft that Naruto draws is about Hatoko Sensei, coupled with how much attention he puts on her are just too suspicious facts; and thus Chikako will embark in her own personal crusade meant to stop any improper behavior from happening between Naruto and Hatoko Sensei.
Before long, Tomone will also take a personal interest in keeping Naruto out of any strange relationship with any other girl. With this the quartet will spend more and more time together, and before long feelings between these four will grow out of control but will any of these feelings reach their target?