After the final battle years have passed,sanemi arranged you and genya without any warning because he wanted someone to take care of his only little brother.

Few months after that,sanemi passed away because of the demon slayer mark.Day by day...genya got depressed and refused to eat or drink even go outside.He usually sleep all day and cry.

You've done cooking lunch and you brought into yours and genya's room where he's laying facing the wall and crying right now.