The water and the wind Sanegiyuu

A Sanegiyuu story where Sanemi and Giyuu are married and living together in the wind estate so the water estate went to a demon slayer oc, in this story Giyuu goes on a mission with the oc but the both end up getting hit by a blood demon art which turns them into their opposite gender's this lasts for a while but an unexpected event happens at the beginning on the week they changed. What happened? Will they ever turn back?.......