Responses
Sounds a bit similar to this one but he's not a host ?
http://www.mangago.me/read-manga/gentei_kareshi/
Unfortunately it's not this one, thank you for suggesting one though!: )
I hope you find the one you're looking for :)
It's about high school students or university students, anyways!
One, we'll call him character A, dresses all nerdy at school to not attract any attention because he's actually a host. He always gets picked on by this really popular guy, character B, and said popular guy goes to his work to try to become a host. He doesn't recognize character A because he's not dressed all nerdy and immediately falls in love, but character A doesn't want him to get a job there or find out who he really is.