Sealed with Fate

One day on Earth, portals began appearing out of nowhere, unleashing alien-like creatures known as Wanderers before vanishing just as suddenly. Whenever a Wanderer emerges, citizens must immediately call the emergency number "W" to ensure rapid detection and the swift deployment of the nearest Slayer.

Sylus, a renowned Slayer and prodigy, graduated at the top of his academy with record-breaking performances. One night, Layza, drunk and disoriented, wandered through the corridors of a nightclub in search of the restroom, only to accidentally stumble upon a room filled with weapons, unaware that she had just discovered the headquarters of Sylus' gang...