Sato Chizuru, the protagonist, works hard at an old-fashioned manufacturing company, enduring the triple hardships of hard work, sexual harassment, and alcohol harassment . On her way home , she meets a beautiful boy named Tsukasa in front of a convenience store. Tsukasa is just the type of handsome, friendly, and kind, which makes Chizuru's heart flutter. The two hit it off while drinking on the street, and head to Chizuru's house with their arms linked and their fingers entwined... "This must be a reward for me for working hard every day..." Tsukasa gently caresses Chizuru's body as she is in a dreamlike state. And just before they finally connect, Tsukasa tells Chizuru, who is eagerly waiting for the act, "Chizuru, can you leave me here?" "I'll let you release your stress like this too." "So... right? Please..." he asks to live with her, in an unexpected turn of events? There's no way Chizuru can refuse when he's offered a "reward"... The deal is made: "All the housework and living together with good sex." Is the runaway boy, Tsukasa-kun, really an angel who can brighten up Chizuru's stressful life?