Summon Heroic Spirits at the End of the World

I don't know what to write, so I just write a side story It is only recommended to read the relevant chapters of F/A. The other chapters are not well written, so don't waste your money! F/a The writing is still okay, but some chapters have been deleted for some reasons, which should not have much impact. Don't read the rest, really, trust me~ by a kind-hearted author This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.