The story is set in a fantasy world of swords and magic, but this isn't a typical fantasy world since the technological progress have advanced so much that smartphones are everywhere!!
Everyone lives a peaceful life until one day a brother and a sister find a very strange sword.
Original Web Manga
Official English Translation
TOBITA Nikiichi
Related works
"Once upon a time, this world was ruled by beasts. Humanity no longer sat atop the foodchain, they are the monsters' prey. However, those who would stand up against the monsters gathered together and they continued to battle against the monsters in order to survive against their rule. Since then, hundreds of years have passed... and now the "fight" against the monsters has…
From Boon Scanlations:
Adapted from the "How I stalked some dude with an exposed nipple and stumbled upon the Zenithian Swordwwww" thread started by an anonymous poster with the ID YDmPhSO2 on 2ch.