Tell me who is or what manga ? is that guy from page 1

the way to protect the female lead's older brother

proud jeremy supremacist moment. His name is Jeremy Agriche and he's from "the way to protect the female lead's older brother"
https://www.mangago.zone/read-manga/the_way_to_protect_the_female_lead_s_older_brother/

I'm the owner of his house

Sadly i already read it

you may be the owner of that house but i'm the owner of the land that the house is built on