Doukyuusei no Dorei ni Nattemita

Yasuomi Takezuka is in deep trouble as his parents' company went bankrupt and his family got into debt! Thankfully, a rich classmate, Sakuranomiya, offers to save his house. However, there's a condition: "From today on, you are my slave."

But things are totally not going as Sakuranomiya expected...

(Source: Ichijinsha, translated)