4-year-old Michiyo Mabuchi (Kumiko Aso) and 26-year-old Yoshimi Tendo (Shota Yasuda) meet at a screenwriting class. Michiyo Mabuchi, who is called "Basyauma", works hard to become a writer, but can't see a future for herself as a screenwriter. Meanwhile, Yoshimi Tendo is a bigmouth who never tries hard at anything. These two people fall in love.

Overview from themoviedb.org