Even after being dumped, work continues. OL Tanaka Iori is drowning her sorrows in drinks at her favorite bar to heal from her heartbreak. In a drunken moment, she ends up sleeping with a somewhat intimidating familiar staff member, Sendou Minami. Iori regrets her mistake, but Minami tells her, "I don't want to forget..."? A messy yet caring Iori and a kind but complicated Minami, who have completely different ages, circumstances, and backgrounds, find themselves in a love story that begins from a mistake between two girls.