Saeko works for a design company, but because she does so much overtime, her love life is non-existent. One night, her hot but shy and quiet colleague Masato offers to walk her home. Out of nowhere, he flips from sweet, younger-looking beta boy to total alpha! She ultimately lets him up to her apartment so he can help her with a potential stalker, but as they give the stalker a show, Masato gets turned on. He leans into her in bed and tells her he can't control himself anymore...!!