Hard Nerd Daddy: Hatarake! Otaku!!

The "male maternity blues story" revolves around a manga creator who used to spend lavishly on his otaku hobbies, thanks to the carefree life of a dual-income marriage. That all changes when his wife gets pregnant. Suddenly, the man has to juggle manga or money… otaku hobbies or cost of living.

(Source: Anime News Network)