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With Yukari fallen ill, Daikichi has to look after Kouki. Later, Rin beings to lose a baby tooth and Daikichi reflects on the past year since he took in Rin.
Sickness has been spreading lately, and Rin falls ill due to stomach flu, and Daikichi is unsure of how to nurse her until Yukari shows up.
After seeing his coworkers worry about their children, Daikichi begins to worry about getting insurance. Plus, Kouki and Yukari have to stay over due to a typhoon.
A year has passed since Souichi's death, so Daikichi and Rin pay their respects at his grave. As it turns out, Masako has the same feeling and Daikichi tells her that she has the opportunity to see her daughter.
Daikichi's cousin, Haruko Maeda, and her daughter, Reina, have run away from home and stay at his house until their domestic problems can be settled.
Daikichi and Rin plant a loquat tree in the backyard to celebrate Rin's entrance into elementary school, but that brings up the question if a tree was planted when she was born, like with Daikichi and his relatives.
As it turns out, Masako the maid is also Rin's birth mother, but she was unable to raise her due to her career. In order to avoid social hardships, Daikichi is advised to change Rin's last name from Kaga to his own, Kawachi, but decides not to since Rin likes her name.moreless
At nursery school, Rin and Daikichi make friends with a boy named Kouki Kitani and his mother, Yukari. Also, Daikichi finds the contact details of the mysterious Masako and arranges a meeting with her.
While looking through his deceased grandfather's belongings, Daikichi finds something that may be a clue to Rin's birth mother: a computer modem. Afterward, Rin explains that her father (whom she refers to as "grandpa") had a maid named Masako Yoshii, although she didn't get along very well with her.moreless
With a daughter in his household, Daikichi now has to worry about new clothes, nursery school, and his work hours if he plans to continue raising her.
30 year-old Daikichi Kawachi and his family are mourning the death of his grandfather, Souichi Kaga, when they find out he had an illegitimate six year-old daughter named Rin Kaga. Daikichi finds it unfair that his relatives would put her in a foster home, so he opts to raise her as a single father.moreless