Episode 3
It's Valentine's Day, and elite class hottie Yagi and genius Nezu are getting a lot of attention from the girls. For some reason, Yagi is very interested in joining the babysitter club... The kids are going for a walk in the school yard, but the minute Ryuichi takes his eyes off of him, Takuma is seized by a strange man... who turns out to be his father!
Aired 21/01/2018EP 3 - Episode 3

School Babysitters
The manga centers on the brothers Ryuuichi and Kotarou Kashima. Ryuuichi is in high school and Kotarou is still a toddler. After their parents are killed in a plane crash, the two brothers find themselves living with the chairwoman of the Morinomiya Academy, who herself lost her son and daughter-in-law in the same accident. The chairwoman, however, has one stipulation for the brothers in order to live with her: Ryuuichi has to work at the academy's daycare center as a babysitter.
(Source: Anime News Network)