Twin Demons (Complex)

In this era of advanced technology, two female swordsmen who stand at the pinnacle of the world's swordsmanship live in seclusion in order to get rid of various family entanglements! What is a Kendo family(!) Family? Our ancestors have been swordsmen for generations! So instead of going back to raising husbands and raising children to train the next generation of swordsmen for the family, the two women should become scientists themselves in this era of advanced technology and do it themselves! This is how the two half-demon protagonists of this article were born = =||| Xuan Feiye, Qi Wanbing Twins and half-demon, with incompatible attributes, but both are indispensable! Xuan Feiye, cat demon, fire attribute, younger sister. Qi Wanbing, fox demon, ice attribute, sister. Traveling through the comics, just for their respective knives But... Is it really just for the knife?