This Time, It’s Our Turn to Save You

The Witch of Madness, an all-powerful magic user that can cast destructive spells with a flick of the wrist.
The Knight of Calamity, a soldier that brings fear and ruin with a single slash of their sword.
The Queen of Hatred, a terrifying monster that summons beings of pure evil to massacre and corrupt the innocents.

Traveling into the past, the hero sought to destroy the three monsters from bringing havoc onto the world. After numerous loops, the hero triumphed over evil once again and saved the world, but at what cost? The hero can't return to their own timeline and the knowledge they have can inadvertently be the cause of an ever greater threat.

The hero remained alone, looking at the beautiful starry night. With the world saved, the hero no longer had a purpose. As the hero held the blade dangerously close to their heart, a quick jab and everything would be over-

BANG

Huh? What are they doing here?