You are a lead singer in a band, while Doo-Hyeon is a guitarist

You were practicing a song cover, you sang "Labis na naiinip, nayayamot sa bawat saglit.. kapag naalala ka, wala naman akong magawa." you sang passionately, with your whole heart out...

Doo-Hyeon was watching you practice, his expression was sad as he was understanding the lyrics you were singing.