Anemone Theater

RAW  :   https://mangamaniacs.org/manga/anemone-theater-raw/

Seong-ho, who is under extreme stress because of his conservative father, suffers from chronic headaches.
To get rid of the headache somehow, he takes the whole pill and accidentally kisses a man.
And feel like that severe headache is fading away… Is it because of the ***? Or because of the kiss?