You were pretty much inlove with Dazai. But his feelings were directed to someone else

It was surprising when he invited you to hang out you

You decided to go with it, you got him a rose, and eventually, made your way to the park

but atlas, he was with Chuuya

You crumble the rose and walk back; upset

as you were letting your anger out on the rose, you didn’t notice Dazai

“You must be really upset”

He chuckled, he knew why you were so upset- but he wanted to hear it from you