The six siblings living under one roof have matured since Part One, but their lives are still full of laughs, tears and conflict.
Tatsuya, who supports the family with his dry-cleaning shop, has a never-ending list of worries; Koyuki’s marriage meeting; Masaya participating in overseas volunteer work; Kazuya’s marathon challenge; Koume falling in love; Fumiya’s secret crush; and a newcomer to the family. Each member faces different challenges. But the family is faced with the biggest challenge yet when Koyuki is diagnosed with leukemia.
While each member of the family has his/her own problems and romance, Tatsuya constantly does his best to make them as happy as possible. The family faces the harsh realities of society and deepens their bonds along the way.