6-kai no Yakkai na Juunin-tachi

A clumsy love story of a man and a woman unfolds in an apartment.
Late at night, Yasuyama opens the door unexpectedly to the sound of the front door rattling, and smashes the door in the face of a strange woman. The woman was the resident downstairs. The next day, he tries to talk to her in the elevator, but she is crying... Yasuyama, a 28-year-old working adult with a cynical view of love, and Toko, a 24-year-old plain girl, have a bad encounter, but they have something unexpected in common.

(google translated)