The tale revolves around Naoto, a university scholar, and Kou, a youthful attendant at a spa. After a dreadful day in which he misses his school's inauguration, loses his occupation, and discovers that his hot water has been turned off, Naoto encounters Kou at the spa where he works. Initially, Kou appears to be youthful, delicate, and attractive, but Naoto promptly learns of his true demeanor. Despite his young appearance, Kou is bold, hot-headed, and far more experienced than he appears. Nevertheless, his body is petite, and Naoto is unwilling to let him control all of the spa's work. Therefore, whenever he can, Naoto begins working for the spa himself. Even though Kou isn't the person Naoto initially envisioned, he is still fascinated by the little man.
