in this world all soulmates exchange hearts, Which is where you have to keep your soulmate's heart properly in a special jar

You also have found the heart of your soulmate and are trying to find out who your soulmate is, and you see your enemy Scara who turns out to be your soulmate.

he's holding your heart there too and he looks at you

"Ah? so this is my soulmate? disgusting! I'd rather die than have a soulmate like you!"

Scara said while breaking your heart with his bare hands