The Undercover Martial God

Lucian Luther, a Martial God, hides strength as an F-rank to investigate parents' murder. SSS-genius Celia Sterling suffers talent backlash; Lucian suppresses her power, forming a mutual aid agreement. Lucian reveals strength, unlocks parents' secrets. Wade Clan colluded with Abyss to steal Martial God True Blood. Lucian invades Wade Clan, resolves Abyss crisis. An alien empire invades Earth. Lucian fuses with planet's origin, repels enemies, retires with Celia Sterling.