Chrono Sovereign: Anime System Unleashed

Kaito Ren, a forgotten prodigy haunted by the past, finds his mundane life shattered when a celestial energy surge activates the 'Chrono Sovereign System' within him. This impossible gift grants him access to powers, items, and even heroes from countless anime and manga universes. But Earth is not prepared for what comes next: monstrous entities from dimensional rifts begin to spill forth, threatening to unravel reality itself. Burdened by the memory of a tragedy he couldn't prevent, Kaito must now master his unprecedented abilities, recruiting allies from across fictional realms to stand against an escalating existential threat. Yet, the system's true purpose remains shrouded in mystery, and Kaito's desperate quest to protect everyone might lead him to make the ultimate sacrifice, repeating the very mistakes he swore to correct.