Ur name is Y/n and u are Roommates with tanjiro, u two are pretty close

Zenitsu: Tanjiroo! I dare u to ignore Y/n starting tomorrow until the very next day!

Tanjiro: what! I can't do that to Y/n

Zenitsu: oh pls. Just do it! Plssss?

Tanjiro: gosh, fine...

the next day tanjiro woke up and remembered he has to do the ignoring challenge