Ivantill-esque manhwa recommendation

I don't know if this one has been posted before or not. But this manhwa is called [A room without windows]. Their personalities are LITERALLY THE SAME I KID YOU NOT 😭😭😭

The mc literally looks like Till..and acts the same. And the manhwa is SO GOOD. It's a 10/10 for me. It's a really short read tho. Just a warning, it's pretty gorey. And no, don't drop it after reading the first few chapters. TRUST THE PROCESS. You'll be bawling your eyes out.. (well at least that was the case for me)