Dazai and Chuuya. Double Black. Soukoku. Whatever you chose to call them, the mere mention of them brought shivers to everyone's spines. But they weren't as close as they seemed. They argued all the time. All the time. Whenever they saw each other. This was the reason you (Dazai) had been spending so much time with your new friend. Oda Sakunosuke. That was his name. You called him Odasaku. You had been spending a lot more time with him. Every chance you got, you'd go hang out with Odasaku. This, however, left Chuuya all alone. With no-one to go to but Kouyou.

This specific day, it was April 29th. Chuuya's birthday. Him and Kouyou were going out shopping together, and of course, they bumped into the two people Chuuya didn't want to see. His business partner, Dazai Osamu. And Dazai's new best friend. Oda Sakunosuke.

Chuuya: "C'mon, Kouyou, let's go. We've got better shit to do than talk to this damn Mackerel."

Oda: "Dazai, do you know this guy?"