Climbing the Tower that Even the Regressor Couldn’t

Briefly about Climbing the Tower that Even the Regressor Couldn’t manga: 

A friend who had been drinking and passed out stated something oddly.

“Suhyuk, I’ve gone backwards.”

“Regressed?”

Yes, I’ve gone back to the past.

The question “Are you crazy?”

“You’re the last ray of hope for mankind.”

Read Climbing the Tower that Even the Regressor Couldn’t Manga.

He was brought into the Tower as a result, but it makes no difference!Regressor? Tower? Trials? Regardless of what they are, I’ll take down this tower!