Marvel: My Sign-in System Novel

Trapped as Hydra's lab specimen, Leon discovers an awakened sign-in system that becomes his salvation. The Glint-Glint Fruit emerges as his inaugural reward, granting him the strength to annihilate Hydra's operations. As temporal milestones accumulate, he unlocks increasingly formidable powers, ultimately obtaining the Sun Breathing Technique—the gift that elevates him from captive to unbeatable protagonist.