In Shunya's workplace, speculation abounds concerning the supposed disappearance of the company's Vice President and heir, Yuusei Saotome. According to word of mouth, he absconded in order to evade an arranged marriage that would have financially benefited his father's business. However, Shunya holds a hidden truth - Yuu is with him in his apartment, suffering from amnesia.
The previous Yuu was distant and standoffish, but the amnesiac version is warm and affectionate. He takes pleasure in cooking for Shunya and their bond grows stronger. As the relationship between the two men deepens, Shunya is consumed by doubt regarding what he doesn't know. Will Yuu's lover come looking for him? And what will happen when he finally recovers his memories? Will Shunya be embraced or rejected?
Also included in the book are three other short stories: Naisho no Lesson, Himitsu no Koibito Sengen (Secret Lover Declaration), and Yakusoku wa Nandodemo.
