A new female lawyer Ayukawa Wakaba (played by Yui Aragaki) who comes from a poor family but has a strong personality, is entrusted by her female boss Sakuragawa Shoko (played by Hiroko Yakushimaru) to take care of her 5-year-old daughter Sakuragawa Hinata (played by Tani Kanon) on her first day of work. Therefore, Wakaba had to take charge of Hinata's schedule, and met a single father and popular king among children, Yamada Souta (played by Ryo Nishikido) in kindergarten. Due to a previous misunderstanding, Wakaba has always had a bad impression of Souta. But after a series of things, they gradually got along and found that Souta was a good family man with a strong sense of responsibility and a gentle temper. But the strong Wakaba has always dreamed of becoming successful, and Souta, who has no property, no housing, and no education, can't give her these. Wakaba, who is not satisfied with the ordinary, will never admit it even if she cares more and more about Souta. The two have many twists and turns in their relationship. The love story of a strong woman and a weak man, with the help of children, is quietly staged in sadness and warmth.