Daikichi goes back to his parents’ house with Rin in tow in order to search for clues about her mother. At first, his parents were opposed to him taking custody of the girl, but now they’re not entirely dissatisfied about having what amounts to a grandchild. And at his grandfather's house, Daikichi discovers a mystery modem. This leads him to think about his life with Rin and he makes an important decision.