Quirk malfunction (mha)

Hi I'm a swich(leaning to sub,wanting to do a mha!roleplay,more focused on romance.
Yaoi.
More of a oc x canon stuff.
No short replies pls 
And don't make the character extremely out of character
But if you want to use a oc just know that you need to do my oc crush and I do yours.
Unless you want to use a canon character.

We can discuss about the crush and stuff more in the dm.

 more of a romance roleplay idea instead:
In mha(romance,slow burn(depends),porn with feelings.

In this idea is about a quirk malfunction or a unnatural occurrence that made one of then or both of then become sirens,the person(u/or my oc),is very reluctant and shy about coming out since their body changed so much that they are unrecognizable,to the point of shying away from being seen at all.
(Or they could have become a incubus)
I was thinking about my oc having been a girl but because of this accident they are not a girl anymore.

Ok with: heat cycle(mating),aphrodisiac,transformation,gendebend,monster girl/boy,tight clothes,creampie.

Not ok with:overstimulation,mind break,mind control,inc€st of any kind,sl@ve,feet play,food play,any disgusting kink,bdsm.

https://pin.it/1XtKMhC