9 parts Ongoing MaturePart one in the Sun reborn series
The Kamados are attacked far sooner then in canon and causes a butterfly effect, essentially saving more lives.
Giyu arrives at the Kamados home just in time to be turned into a demon. Upon the dying breath of Tanjuro, the slayer is given a cryptic message.
When he wakes up surrounded by his own blood, having no memory's of being the current Water Hashira only as a demon slayer, the newly orphaned Tanjiro held in his arms, and a pair of earrings that hold more than just a ghost of a legacy dangling from his ears, he is determined.
However, he isn't alone when he wakes up. A familiar demon with a Nichirin blade is sitting right next to him, his plum eyes knowing.
Or
Giyu learns from a long dead slayer, grows, opens up to the people around him, find's family in the most unlikely of places and lives once again. However, this family of demons, humans, and two spirits must tread lightly when they fully return to the demon slayer life 13 years later.