yellow roses [book 1 - mysmes hanahaki trilogy]

MC and Saeran are, to be blunt, fuck buddies. Saeran has no idea of MC's feelings for him, and is bewildered when MC suddenly starts coughing up flowers.

Is it better to love and never be loved in return, or never love at all?

...

MC woke up choking.

He couldn't breath, something was in his throat. Heaving, he flung his sweaty sheets off him and rushed to the bathroom, face turning red. Clutching his throat, MC gagged, leaning over the toilet, coughing until whatever it was flew from his lips and landed in the water.

Recovering his breath, MC looked down, and was suddenly bewildered. Floating on the surface of the water was what looked like a petal, wet from his mouth, but still crisp and in a slight bowl-shape. The petal was yellow, and had a light orange rim around the tip.