Joyful's manga / #age gap(4)

Ai Morikawa is a hard-working career woman at her job in Tokyo. After a long night at work, she returned home on the last train to find a handsome boy at her door. The 16-year old Nagisa is her sister's stepson, suddenly sent to live with Ai when his parents left for an overseas job. Wary like cats, these two loners 10 years apart in age will have to make a new life together.

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.

The beautiful Mio Saeki seems like a quiet young lady but when she's in the Japanese prep room she acts like an old man, eating squid sticks and talking about horse-racing. Only her teacher Shirokawa knows her true nature and despite his slightly sadistic teasing, they get along so well that she finds herself falling for him.