Let me be your last love

Ryusei, a middle school student, visits a cafe that runs a snack bar at night. There he meets a variety of unique people and a staff member named Chihaya. He falls in love at first sight with Chihaya's pretty face and smile, but soon realizes that he has lost his love. But Chihaya's eyes are always on Sunazuka, who has a ring on the ring finger.