[Crossover] + [No CP] + [Plot-oriented] + [Not invincible]

The protagonist has the same appearance and Sun Breathing as Yoriichi Tsugakuni, but his strength is not as strong as Yoriichi Tsugakuni, and his personality is exactly the opposite.

Gu Xuan: I can’t protect anyone I want to protect. I am a worthless man.

Everyone in the Demon Slayer Corps: It was Mr. Guxuan who led us to kill Muzan Kibutsuji, and it was also Mr. Guxuan who saved us when we were in crisis.