hi! i'm looking for a bl manga i read a very long time ago. the protag (uke) was a student working at a store, i think a bookstore. the love interest (seme) was a supervisor at the store and i believe a couple of years older. they had a bit of a rocky relationship at first because the protag tried hard but the love interest was stern and hard to read. protag was obsessed with the voice of someone, maybe a radio host or someone who narrated books? and the supervisor/love interest had a very similar voice, so the protag ended up falling for him. i remember one scene in the last or second-to-last chapter: on the day of the protag's birthday, he became of age and someone, i think the supervisor, made a big deal about finally being able to sell things from the explicit section of their store.

i don't even remember if it was good or not, i'm just obsessed with it because i read it years and years ago and haven't seen it again since. if anyone has any clues, i would appreciate it!