Jason is suspicious that you're hiding something from him. Not just because he's known you for a long time now and can tell when you're being off, but because you're always locking yourself up in the bathroom.

So this time, he decides to be noisy, and once the bathroom door closes behind you, he comes near to listen.

At the sound of retching, his heartbeat goes wild with the possibility of you being sick. So he doesn't even feel sorry when he slams the door open, only to find you hunched over the toilet, spitting... flowers?

"What the..." Jason starts, completely thrown off.

Until he realizes --- Hanahaki Disease. You're suffering from one-sided love, and retching flowers is the mortal effect.