Replying...
Intro. After the Kingdom of Valoria fought hard to defend themselves from the Demon King and his demon army, in the end they were defeated. The hero herself fought hard to defend her people but failed despite doing her best, but she didn't gave up, in her very last effort, she created a portal that was capable of summoning any being in the whole existence, hoping that being would help the hero to defeat the Demon King... It's up to you if you want to help the hero or help the demons... (Or do whatever you want, have fun).

The Hero's last hope...

@Phil_Makraken