Anime Crossover: Taking on Ryomen Sukuna One-on-One from the Start

I transmigrated, but the situation seems a little unusual. Lin Fan was about to go out for breakfast when he saw the ultimate life-form bathed in sunlight. He shut the door without expression. Thinking he might be hallucinating, he opened it again and saw a red-haired Demon Slayer Corps boy holding his still-living sister, weeping with joy in the sunlight... All right, it wasn't a hallucination. Lin Fan casually shut the door and began to question his life. He couldn't understand how he'd managed to do this. Then he tried opening the door again, only to come face-to-face with the strongest King of Curses in history.

"..."

This was bad. Lin Fan tried to close the door, but Ryomen Sukuna casually blocked it. It felt like the sky was falling.

"I'm fighting Sukuna? Seriously?!"