Genkai Koe No Tenpu wa, Tensei-sha ni Shika Atsukaenai – Overlimit Skill Holders

The main character, Rage, was still a 10-year-old child, but was working as a slave in a mine where natural gems are produced.
He was spending harsh days of mining with his sister’s slave, L’Arc.・ Ruler >>] is obtained.
Rage has become a talented person who has surpassed human intelligence from a helpless slave, but in the midst of a riot, he broke up with L’Arc, who was the only one who could forgive his heart.