eri inui is a 20-year-old college student aspiring to become a mangaka. she has been following this dream ever since she was little and has been the best artist among all her friends. but she still hasn't found a publisher willing to take her under her wing. one day, however, souta inuzaki, the son of a distant relative, comes to live with eri and her mother. souta is an aspiring violinist and has come to tokyo to practice. eri sees a lot of herself in the young souta. but how will she deal with a 13-year-old boy following his dreams and going through puberty?