During his youth, Kazushi suffered from dreadful nightmares due to his insomnia. However, upon hearing his co-worker Wabuka's soft and soothing voice, Kazushi quickly falls into a deep sleep, even fainting at times. Wabuka, aware of this effect on Kazushi, impulsively proposes they live together. Isshi, a man in his thirties, finds the idea of two men sleeping in close proximity bizarre. Nevertheless, Wabuka has become increasingly important to Kazushi.