What I'm looking for is not stability but "stimulation." The bite mark you put on me, it's gone, hasn't it?" Hina, who runs a detective agency, meets Seishi, a clerk at a coffee shop near his new office. Hina is intrigued by his rebellious attitude and charming demeanor and frequents the coffee shop. Kiyoshi, who runs the store by himself, gradually begins to open up to Hina, who has become a regular customer. One night, Hina notices this and, as a thank-you, begins to touch Kiyoshi in a lewd manner... 「君が付けた噛み痕、消えちゃいましたよ？」探偵事務所を営む飛名は、新しい事務所の近くにある喫茶店の店員・清志と出会う。反抗的な態度、その割に愛嬌のある雰囲気…。彼に興味がわいた飛名は、喫茶店に足繁く通う。一人で店を回している清志は、常連客となった飛名に対し、少しずつ心を開きはじめる。その様子に気づいた飛名はある夜お礼と称し、淫猥な手つきで清志に触れはじめ――…。