[So in the story Rin has known all his life that he has demon powers and has known that Yukio was an exorcist.Also Rin didn't unsheathe his sword so no powers yet.And the story takes place two months after Shiro has died and it is after the exwire exam so Amimon isn't in the story yet] So in this story things are very different,If you find someone that you love of the people that you love,If your bond is strong enough then you are able to fuse with that person.(Like from steven Universe) And Rin has been dealing with a lot lately with Shiro dying,and just two months ago leaving a toxic relationship with one Reiji Shiratori that he was with for a year.And Now the exwires have to take a fusion class.So get ready for angst,Dancing,Ballroom dancing,Singing,Art,Fluff,Depression,Violin,And sibling love Guys gals and non-Binary pals I give you "Fusion Is Like Fire"

On what was suppose to be a easy demon hunt turns terribly wrong when Yukio and his exwires except for Rin fall into a trap set by a crystal demon encasing everyone in a crystal like coffin that not even Rin's flames can break. 362 years later exorcists are finally able to awaken then freeing them from their crystal prisons. Though there is one question that everyone refuses to answer. What happen to Rin? When they finally find him how will they react to who he is now and how will Bon react to his crushes new attitude.

In one of Rin & Amaimon's fights the Earth King gets a glimpse of Rin's memories. Only to find the younger demon's feelings for Bon & takes his voice away. Now Rin has 14 days to have Bon fall in love with him & have sex with him or lose his voice forever. A/N: [All Blue Exorcist character do not belong to me...(even if I wished they did..)]

Rin's tail. The extra appendage had always bothered Bon. This time, he decides to make a move to figure out just what it's useful for. --- Warning: this is a lemon so read at your own risk