No-Harem ୧•░║║░•୨ACTION -Gem Box 2

mc was demon god of war in his past life who got defeated by hero ..he soon remembers his past & strive to become stronger but the energy he cultivates is not the standard mana but chaos energy (light + dark mix) ..

In the world of The Spellbook Library, Spellbook librarians protect townsfolk from dangerous spellbeasts, sealing them in spellbooks that hold more than just magic. One day troublemaker Yan was attacked by a ferocious spellbeast & was rescued by a group of Spellbook librarians which inspired him to become one ... On the day of his employment exam, he meets Tohru, a mysterious young boy who has his own reasons for wanting to work at the library.Both set off and join the ranks of the Spellbook Lib

Mc was a disciple of the Heavenly Demon but gets betrayed by his disciple-brother and dies. When he woke up, he goes back in time when he was a kid, before he got dragged into the Demonic Sect & this time he decides to go to murim union instead

mc an ordinary high school senior in Korea, was suddenly summoned to another world, where he became a dark mage after lot of hard work he finally able to return to korean after 2 years but during those times dungeons already appeared on korea ..But due to dimension travel he lost all of his demonic energy & skills too .. so he is gradually trying to regain them & finally after absorbing demonic energy he was able to view his system screen