No-Harem ୧•░║║░•୨ACTION -Gem Box 2

MC was the first SSS rank genius hunter but has a rotten personality & is an arrogant prick ..He gets murdered & ends up regressing 10 years back in the past as a cleaner the job he used to look down upon calling cleaners parasites ..but now he needs to become a dedicated cleaner to unlock his lock skills & save himself .. hope his personality changes for better .. his team is nice & all .. & its funny seeing all those misunderstandings

mc's mother died while giving birth to him so his grieve striken father lock himself in a room for 6 years & during that period his father's 1st wife starts mistreating & abusing mc

Mc an orphan after transferring to new school he gets subjected to bullying & became an outcast ..well mc is not an op & he is still learning how to use his powers ...btw this world setting is humans vs demons ..

Mc transmigrated into a novel and became an aide to the final boss aka the grand duke of the story. ..Mc doesn't have any special power and all he has is his knowledge of the future events & here he is trying his best to make sure the duke lives a good life unlike the original ..

Mc used to be the old murim alliance leader but his soul swapped with the lunatic 1st young master of the ‘Heavenly Grand Archive’, Beom Hang who is rumored to be a lunatic obsessed with committing suicide ..As soon as Beom Hang's soul entered Mc's og body he committed suicide & died .Now mc has to live his life as the young master .

Tiny(mc) was send to past by his last surviving comrade, ‘Sword Emperor’, using the power of an heirloom So as usual after going back he is trying to redo things better than his past life & trying to became a better & stronger version of himself ..till not he is till a kid & its been enjoyable ..

- Mc was terminally ill because of various poisons inside his body & doctors told him that he will die until he meets Kiril who tells him that he is a poison hunter & starts helping him