The twins, Aoi and Akane, have been living with their grandparents from their late mother's side and their father. They are now fifth graders and are about to start taking steps towards life while embracing new encounters and new experiences on their own. As they grow up, they do so by remembering the teachings of the person they still hold the dearest—Shiharu.

This is the continuation of a story of growing up while holding on to small things that bring happiness in life no matter what life may throw at you.

Shiharu is a high school student who loves kids, lives in an orphanage, and works at a daycare... Until the handsome uncle of two-year-old twins offers her a raise if she'll be their babysitter. Often relying on memories of her mother's actions for guidance, Shiharu quickly finds herself falling in love with her new makeshift family.

Tsubaragi, who is a kind and a thoughtful guy, is dating five girls at the same time. The reason is that he doesn't want to see girls being sad because of rejection. But is this situation sustainable in the long run?