When Dazai Osamu woke up, he found himself lying in the bed of the partner he'd had before turning fifteen. The other man's face was flushed, and he looked drunk, half-awake and half-asleep.
Based on what Dazai knew of his longtime partner, and the various traces scattered across the floor, he could conclude
His fifteen-year-old self had forcibly gotten him drunk.
With Chuuya the Tyrant about to wake up and beat him to a pulp, Dazai made a snap decision. He pinched a few red marks onto his own body, messed up his shirt, and put on a pitiful, thoroughly ravished look. Then, looking all vulnerable, he said to the Chuuya he'd just forced awake:
“Chuuya, about last night... you're going to take responsibility for me!”
Chuuya, who had just opened his eyes: “...Huh?!”
Please note:
1. The pairing is Double Black.
2. A feel-good romance. Just enjoy the fun.
Theme: After all the twists and turns, it was still you
