Blue Rose & Black Lily

Goh started to feel his love for Ash when Ash asks him kindly to be his best friend, Goh wants more than that but he's afraid Ash doesn't like him the way he like Ash so Goh keeps it to himself and suffer from the Blue Rose growing inside of his lungs while he doesn't know Ash loves him so much Goh means the world to the Alola Champion and one day he decided to tell Goh his feeling.
Turns out two boys has unrequited love for the other.

Art by: ふうり on Pixiv
I've also post this book on Ao3 as Chongyun :) I will update there faster so if you like this book please check it out!