Xarpolis
Life's a Dream
If anyone read the light-novels for Solo Leveling, it's in the middle of Chapter 132 right now. That's where he enters the 2nd red gate. 132 of 270 total chapters. You're so close to the half way point!
They don't even tell you what he encounters inside of that gate. It's over in like 2-3 minutes tops. He just suddenly appears back outside after the girl worries about him getting hurt for real after she wishes the sprained ankle on him. He's a monster.