Serenading Taehyung was something short notice and not what he had planned at all but the good thing was that he already knew what he would sing.
A few days ago, Jeonguk had been searching random key words in hopes to find some new music, when he came across the song "I can't help falling in love with you."
Jeonguk knew of the song before but never bothered to listen to it thoroughly enough that he knew the lyrics. For some reason though, that day he decided to listen to it and... well he liked it so he replayed it quite a bit. Well enough that he knew the lyrics.
Thank god he did. Because now he had the perfect song to serenade Taehyung with.
So, you could say there was no actual plan...just sing his heart out for Taehyung and hope he'll accept his confession.
No pressure, right?
Jeonguk sighed and started mentally preparing himself for what he was about to do, before he stepped out of the house to make his way to Taehyung's apartment.