Ryuichi and Kotaro are brothers who lost their parents in an airplane crash. They're taken in by the chairman of Morinomiya Academy, who lost her son and daughter-in-law in the same crash, on one condition: Ryuichi has to babysit the kids at the daycare room in the school! This room was opened to help the school's teachers who had kids to take care of, but it suffers from a lack of staff until Ryuichi becomes the first member of the babysitter club formed to solve that problem.
| Title | Time | |
|---|---|---|
| 1 | The Kashima Brothers and the Babysitters Club | 2018-01-07 |
| 2 | A Day at the Zoo with Everyone | 2018-01-14 |
| 3 | A Promise Between Brothers | 2018-01-21 |
| 4 | Ryuuichi Falls Ill, Kotarou Steps Up! | 2018-01-28 |
| 5 | Love, Superheroes, and Little Dreams | 2018-02-04 |
| 6 | Kotarou's First Errand | 2018-02-11 |
| 7 | The Twins' First Time Apart | 2018-02-18 |
| 8 | A Love Letter and the Summer Festival | 2018-02-25 |
| 9 | Daycare Beach Trip | 2018-03-04 |
| 10 | A Day at the Cultural Festival | 2018-03-11 |
| 11 | Saikawa's Babysitting Challenge | 2018-03-18 |
| 12 | A Christmas Surprise | 2018-03-25 |
