'Love Tripped Into My Room: I Just Wanted Peace, Not Panties' - Chapter 6: She Transferred Into My Class. I’m Not Safe Anymore.

A former sporting rifle shooter genius transforms into the ‘Juvenile Butcher’. While originally supposed to have received the death penalty, he was instead fortunate enough to have entered a secret and highly regarded armed force, throwing himself into the ‘Nirvana Project’.

Violence, Rogue, two names that had long since faded away from the limelight. In a new game, The Strange World, they appear once again. The two former legends, once more rise to glory.

- Description from Novelupdates

A man who gets into the Webtoon comic he reads and becomes the most feared S rank Villain, but actually he is a loser??

After traveling to the Great Wilderness, Shen Can became the Ancestral Temple Keeper of the Blazing Flame Tribe due to his 'frail' body, responsible for the daily cleaning, offering incense, and routine sacrifices at the Clan Ancestral Temple..Shen Can fulfilled his duty as Ancestral Temple Keeper by using the 'Simurgh Blade' to pierce Wild Beasts' necks, extracting their blood to offer to the ancestors, only to discover that he could absorb their lifespan to deduce a cultivation method.