Our Short-Term Dads are College Students?!(2019)

Kikan Gentei Papa wa Daigakusei: Onii-chan to Otouto-kun, Hiroimashita

Two junior college students will become fathers today!

In the summer of their third year at university, Keisuke and Rei start raising children as their fathers despite not being married! Keisuke doesn't have many relationships with other people, and his only best friend on campus is Rei, a handsome and popular guy who is kind to everyone. Keisuke was the only close friend that Rei could talk to about his true feelings. However, Keisuke, who had fallen in love with Rei, was planning on confessing to him if the time was right, even though it was an unrequited love. One night, small children were in trouble at a convenience store. Rei says, "I can't just ignore them!" and the two boys end up taking care of the children, who don't want to go home.

(Source: BisouBisou Comics)