Oh god, I hate it when people translate "Yuusha" to "Brave". Yes, that's what it literally means, but that's not a term used in English in this context. Everyone else translates it to "Hero" for a reason. Otherwise this seems promising, though.
Always hated these types. "Oh I never knew this happened" what, in a story?. If you're alive there then why would you think that? Never seen any of these get the setting right.