Tatsuya is already facing a challenging life with his unpredictable mother. However, things become even more complicated when he finds out that she has married his teacher and vanished right after their wedding. Now, Tatsuya's stepfather Takaoka takes on the responsibility of caring for him. Although they have a good rapport, their relationship takes an unusual turn when Tatsuya starts feeling more than just a familial connection.
Furthermore, there is a bonus story titled "Hatsukoi" (First Love).
