Dazai is a bully, he's the most powerful and popular in the whole school. He's also a playboy, he was with his friends Aiko and Han laughing and talking about bets. They then saw a girl passing by, she looked very cute and innocent

Aiko: I bet you to make her fall in love with you, then break her heart He smiled evily and so did Han too

Dazai: I bet he smiled evily and he stepped on his ciggar