Keisuke's cousin, Takuya, lost three years' worth of memory in an accident. Takuya wants to stay at Keisuke's house, which he used to visit, for a few days, seeking an opportunity to regain his memory. Unfortunately, Keisuke was away on a business trip, but Keisuke's wife, Miho, who knew Takuya well and was concerned about the aftereffects of the accident, welcomed him. Takuya revives a fragment of memory while spending time with Miho. … And I remembered that I once proposed to Miho.