When I think of the new anime Demon Slayer, it could potentially be crossed over in a story with Nasu-verse. Both universes have breathing that can be used to achieve superhuman and supernatural feats. The Demons could be explained as a result of a daemonic infection that turns people into monsters. I think the only difference with the breathing technique in Kimetsu no Yaiba is that it adapts both the physical body and metaphysical body.