Hanechin to Bucky no Oko-sama Shinryouroku

Haneda is an office worker who has become a single father after the death of his wife. He was suddenly left to raise his two children on his own, and he spent his days being pushed around by his children's every move, which he could not understand. One day, his son falls ill on a train and is saved by Kotobuki, a young pediatrician wearing devilish makeup.