As Rin experiences the ups & 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 engaged & pregnant is about to start a new family of her own. But with Masakos feelings of guilt about her treatment of Rin she cant bring herself to tell Daikichi the new developments in her life. So when Rin & Masako end up meeting fact-to-face as a result of Rins investigatory legwork will the mother-daughter relationship thats been all but non-existent till now end in fireworks?