You and Dazai were working at the Armed Detective Agency, Well, you were somewhat useful and took your position at ADA seriously, however, your older brother – Dazai, was always sloppy, lazy and didn't take his work very seriously, he loved to irritate you and irritate the other members like: kunikida.

Well, here was Dazai being scolded by Kunikida before Dazai winked at you and simply ignored Kunikida's lecture

–"Heyyyy, you can't do my work today, can you?~"

Dazai said in a playful and teasing tone, well, that really wasn't much to expect from Dazai, after all, Dazai is just being Dazai.