Toshimi Watanabe

Pendant les trois années de lycée, Midori a mangé chaque jour le bento que son père lui avait préparé. Et dans le tout dernier bento du lycée, Midori trouve une photo du "premier bento du lycée" ainsi qu'une lettre manuscrite de son père.

Kazuki Suzumoto is divorced and he lives with his 15-year-old son Kouki. Kouki is in a susceptible time. The father feels guilty about his son. Kouki then fails his high school entrance exam. In the spring of the following year, Kouki barely passes his high school entrance exam. Kouki mentions to Kazuki that he likes his father's lunch box. The father and son make a promise to each other. Kazuki promises that he will make a lunch box everyday for Kouki. Kouki promises that he will never skip school.