It is an iro which is compatible with 7th heaven. https://www.nexusmods.com/finalfantasy7/mods/4
That has had some major updates, and it requires it to be above any other possible conflicting mods to work, first possibility. Second are any conflicts turned on that can be turned off. Third is the music and direct folders, they have to be deleted every single time you boot up the game other than the initial 2 folders, but there will be a pause in some cases, as they are loading your mods and that depends on your system specs, too.
Furthermore, make sure to check the comments, the most recent versions ARE NOT on 7th Heaven but on google drive and in those comments, not on Nexus.
Also, one more thing, let me give yet another example, if you turn on dynamic weapons with Nino's and Kal's same time you may have conflicts, so choose dynamic weapons with only ONE creator's mods 'ON' and the one you don't want the other version of, 'OFF', as a cautionary, and keep the one you want active if dynamic, up top of the other.
Further edit: This modder EVEN fixed a mod on 7th Heaven having compatibility issues. Get it and the update from google drive. This post here has both links, from TODAY..
https://forums.nexusmods.com/index.php?showtopic=6499281/#entry69456707