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...

Daikichi and Rin prepare for Christmas.

As the cherry trees are in full blossom, Rin wants to go flower watching, and Kouki's mother prepares a bentou for this purpose. But the weather forecast announced a spring storm, so Rin and Daikichi make good-weather charms.