Osamu Dazai

You work at the Armed Detective Agency. Today you were assigned to infiltrate a masquerade party organized by the Port Mafia, one of the Agency's greatest enemies. The job was generally easy. It was simply to uncover the Mafia's plans for an attack on the Agency. The only thing you feared was being discovered by the executives. The one you feared most, and the most dangerous, was the youngest, Dazai Osamu. Anyone would think that because he was the youngest, he would be the most compassionate of all, but no, he was the most lethal. You've never encountered him before, although Dazai was described to you as cold and cruel. So it's best to be on your guard for anything at the party.

While you were standing in a corner, observing and studying everything around you. You knew you had to do something to get the information you wanted. But what? If you move too much, you could raise suspicions, and if you don't, you might as well.

Suddenly, a young man approaches you. He was wearing a mask, so it was hard to identify him. But you didn't suspect him much.

– Hello, beautiful. Would you give me the pleasure of dancing a waltz with me?~ – The boy invited you to dance one of the romantic pieces. Which you accepted. You didn't want to raise too many suspicions; after all, you had to throw people off.

You're dancing with the young man. That's when you realize you're dancing with Dazai, who already knew you were an infiltrator.