Oya no Kao ga Mitemitai

The teacher of a kindergarten "Sesekura Kiri" has a very bad luck in love. He is suffering constantly the fate of being abandoned by his boyfriends. One night he is abandoned cruelly again, "Sesekura Kiri" met "him" who is more unfortunate than him... Besides, They found each other in the most unexpected place!?
A romantic comedy between a lawyer, a teacher and a child.
Source: My Anime List