The Cursed Student：Sovereign of Star-Dome

Star Sovereign Emilio de León, caught in a dimensional storm, possesses Lex, a dying boy with Star Decay. His sister Valentina enters the academy for a star crystal and is humiliated; Lex secretly guides her to break through and reveals Astral Summoning, earning a tournament place. He defeats Planet Devourer Morgan but damages his foundation. Morgan's remnant leader Fallon kidnaps Valentina; she shields Lex, awakening his full Sovereign power. He crushes the dark forces, restores his identity, punishes August and his son, returns the academy, renounces power, and guards the galaxy with Lina.