As Rin experiences the ups and downs of being a teenager, she begins to ponder what it means to be family. In her exploration of that question, she takes it upon herself to track down Masako, her birth mother. Masako, now engaged and pregnant, is about to start a new family of her own. But with Masako's feelings of guilt over her treatment of Rin, she can't bring herself to tell Daikichi of the recent developments in her life. So when Rin and Masako end up meeting face-to-face as a result of Rin's legwork, will the mother-daughter relationship that's been all but nonexistent till now end in fireworks?