How to Kiss Your Mortal Enemy

The System started taking a cut from my saved drafts, so I decided to practice my writing. A bedtime idea turned into a story.

"Performative personality receiver x high-IQ, twisted top." Neither of them is mentally well.

Basically, the receiver is jealous that the top stole his spotlight, so he uses every trick in the book to marry him, all for revenge. But then he gets locked in a room with his hated husband, and the only way out is for two people who love each other to kiss. He thinks he doesn't love him, but actually he does. He thinks the other loves him, but actually he doesn't. He thinks the other loves him, but actually he doesn't, even though he really does...

So, if they're trapped in a room that only lets people who love each other out when they kiss, does he love him or not?

And how did he end up locked in that room in the first place?

Theme: True love exists in this world.