After entering the workforce, the protagonist, Masashi, married his girlfriend, Minori, and was living a happy life. However, during an overseas business trip, he was involved in an accident and went missing. Miraculously discovered alive, he finally returned home two years later. Supporting him through the days as he tried to make up for the two-year gap were his wife, Minori, and his one and only best friend, Zen'ichirou. Masashi was deeply grateful to both of them for their support and resolved to shower his wife with love to make up for all the time they had lost.

Around that time, upon learning that Zen'ichirou was staying in a short-term weekly apartment, Masashi decided to let him move into a spare room in their home. And thus began their life together under one roof. One evening, however, as Masashi happened to pass by the living room, he caught the two of them sharing a kiss. Masashi then got them to confess what had transpired during those blank two years. It turned out that Minori and Zen'ichirou, believing Masashi was dead, had already entered into an intimate physical relationship......