You and dazai have been dating for a while now, and you would usually visit him at the ADA, and he would literally take you to the bathroom and make out with you, saying he missed you. One day, you decided to visit him, and overheard something, it seemed they were thinking if they should let you join the Agency as one of their detectives, when dazai opened the door and greeted you with a kiss

"Hello, darling~ have you been waiting~?"

Dazai said flirtatiously, with his flirty face