After her five-year relationship ended, Michiyo Ozawa, 26, joined her colleagues for drinks. Tragically, when the elevator to her apartment was out of order, she suffered an accident. As she had no other option but to seek refuge in a nearby residence, Ozawa met Zenji Oyamada, who initially appeared like an average person, until she glimpsed his room's assortment of boxes. Each box contained keepsakes from his brother, who enjoyed collecting peculiar items from his global ventures.
Enthralled by the boxes, Oyamada encouraged Ozawa to explore one. As she delved into its contents, she discovered a touching tale of an ordinary couple and the peculiar boxes they cherished.