Papa to Mama Hajimemashita.

One day, Mochida found a child. But this kid is really full of strength! And then, she'll have to baby-sit with the guy she loves! That's a really big problem!!

(Source: Chibi Manga)

Included one-shots:
Volume 1: Zettai Ouji Renairon, Suugakuteki Renai Kakuritsu
Volume 2: Mizutama no Koigokoro, Defense Bakari no Koi ja Dame!!