Iki Dekinai no wa Kimi no Sei

Shizuki is a hedonistic playboy who plays the baritone saxophone in the local council's brass band and he openly dislikes the band's popular and prince-like flutist, Yano. At a glance, it seems like they barely associate with each other during practice. However, due to a shared interest, they now have secret meetings in hotels afterwards... (Source: Libre, translated)