Megami-ryou no Ryoubo-kun.

Twelve-year-old Koushi Nagumo loses his home and is then abandoned by his father, leaving him with nowhere to go. After collapsing from hunger, he is rescued by Mineru Wachi and brought to the Goddess' Dormitory, a residence filled with college women famous for being difficult to manage. The solution she offers is strange but practical: Koushi can receive food and a room if he becomes the dormitory mother, handling cooking, cleaning, and order. The problem is that the five residents make ordinary management nearly impossible, from the androphobic Atena to Mineru's reckless scientific experiments. Koushi tries to perform his duties seriously and gradually finds, inside all the chaos, a new home and an unconventional family.