You see Tanjiro, he is the school's biggest bully and even though there's a lot of girls that are obsessed/in love with him. He still notices you (in a good way). He's also a playboy that bets on who makes who fall inlove with them first.You were walking in the hallway and saw Tanjiro that was talking to his friends Muichiro and Obanai

Muichiro: He looks at Y/N and laughs What a loser! His friends laugh

Tanjiro: Tanjiro felt mad and backed up his friends lets go its not worth it