Boku wa Oneko-sama no Geboku desu.

Izumi Yukiharu is an average second-year high school student living a thoroughly unremarkable life—until tragedy strikes without warning. In a single devastating stroke, he loses both of his parents, and the only thing they leave behind is not a comforting inheritance but a crushing debt of 50,000,000 yen. Suddenly homeless and with nowhere to turn, Yukiharu drifts until he stumbles upon a certain residential home that takes him in. The owners are willing to offer him shelter—and even present him with a way to work off what he owes. There is just one condition: Yukiharu must serve as the devoted catservant to the household's pampered felines, who reign over the residence as "their Catships." Thus begins a somewhat peaceful, slapstick-filled comedy of one hapless teenager reluctantly devoting himself to a house full of spoiled, thoroughly worshiped cats!