No-Harem ୧•░║║░•୨ACTION -Gem Box 2

mc died while fighting monsters so his partner reverse time & he went back to past ..Now he is training since beginning to become stronger

MC is the last successor of a fallen founding contributor family faced hardship after his father died in war & his territory captured ...He tried to regain his prestige by entering academy but failed due to his narrowing veins which shattered his dream of becoming a mage ..mc started working as mercenary while managing to reach 2nd circle mage , a 3rd rate mage ..One day while doing a cleaning job at a museum his mother's memento ring reacted with the dragon heart & he got a chance to redo his l

On the brink of humanity’s annihilation, the four strongest survivors tried to prevent it by sending back the strongest mc back in time to the point just before humanity was pulled into the Abyss & transported to another world ..mc being a regressor knows lots of stuff but is focus on his goal & is nonchalant who will kill anyone to get strong but they are already hinting romance

Mc was King Beren of Secretia who died in battle field while protecting his country's treasure "axis of time" along with his trusted servant,Beren at the hand of Karis kingdom but woke up as the 3rd prince of Karis 10 years back in the past. & as usual 3rd prince is poisoned & dying