[Urban imagination + God-killing + Funny + Mental illness + Invincibility + Cool story about the male protagonist]
Lin Qiye was originally the strongest martial arts master in Blue Star. During the top-secret battle to guard the human defense line, he died trying to cover the retreat of the people.
When he opened his eyes again, he traveled to the world of Gaowu where alien beasts were rampant, but became a seriously ill patient in a mental hospital.
As soon as he opened his eyes, he was force-fed medicine by a nurse, and was mocked as a lunatic by the arrogant villain chaebol young master.
After receiving the memory, okay! Original owner, you are too cowardly to be mentally ill.
But now that he's here, he'll first awaken his SSS-level powers, slap the chaebol young master away, and then overthrow the entire mental hospital.
…
After being discharged from the hospital, he slashed the world-destroying monster with his left hand, and rectified the global superpower circle with his right hand. He accepted a few gods as his younger brothers in his spare time, and even brought several lurking mutant monsters to their lair to perform meritorious deeds.
With the ultimate force when he was ill, he killed himself and became the king of all mankind!