What kind of clothes to buy her? What to feed her? What to do about nursery school? Daikichi's new life raising a 6-year-old girl is an uninterrupted stream of bewilderment. Rin looks anxious on her first day of nursery school, so Daikichi does a "pinky swear" with her, promising to pick her up as soon as he can. And Daikichi, who has no confidence he can live with Rin for long, starts thinking about meeting Rin's mother...

Rin befriends Kouki, a boy she met at the local nursery school, while Daikichi's pulse races a bit when he meets Kouki's beautiful single mother. Later, the modem Daikichi found leads him to his grandfather's last words. And from there, he receives a contact number for Rin's mother, Masako...

When Rin enters elementary school, Daikichi proposes planting a tree to commemorate the occasion. Rin plants a loquat seed in the yard, but there's no telling whether it will actually put forth buds. Thinking that perhaps Souichi planted something to mark Rin's birth, Daikichi has another visit with Masako...

Daikichi feels helpless when Rin is laid up with stomach flu, so Kouki's mother steps in to give them both a hand.

It's the first anniversary of Grandpa's death, which means Rin and Daikichi have been living together for about a year now. Daikichi mulls over what he's lost and what he's gained since Rin came into his life...

After visiting a festival, Kouki is still not tired, so Daikichi suggests a little detour on their way home, thus showing Rin, Kouki and Yukari his "secret place".