Karma hates me, and I hate your new boyfriend

"Dear Diary!
So the thing is: I fucked up. Badly. I should've known better, I should've concentrated on what's really important, but I just couldn't help myself... And I fell in love. With my best friend."

Graduate composer student Shin Hoseok had led a pretty calm and happy life. He's been living in the college's dormitory, he had average grades and a strong portfolio of the songs he composed through university years.
He had a best friend, Yoo Kihyun, who trained to be an idol, and they regularly met up for singing sessions, where the other boy performed Hoseok's songs. The ones he wrote specially for Kihyun, because well... since a few months, for Hoseok, he was more than a friend.
However, the arrival of a new classmate from America had changed everything. The new guy, Hyunwoo also came to be a trainee, he had strong shoulders, a soothing voice and soft brown eyes, and Kihyun became fond of him in a matter of only a week. Hoseok didn't understand: he had these attributes, too, and he loved Kihyun genuinely with all his heart. Then why did Kihyun accept Hyunwoo's affection, and not Hoseok's?

He wasn't the only one in the world whose heart got broken, but Wonho felt like his case was a prize-worthy tragedy.