Serina lives with her middle school-aged sister, Saya. To make ends meet, she works in an office during the daytime and in a restaurant at night. Her busy-yet-fulfilling life is interrupted when loan sharks show up at her door asking for the money her M.I.A. brother borrowed. Not knowing what to do, Serina ends up at an interview for an escort service. She's shocked when the manager turns out to be Tasuku, a kind regular from her restaurant...