It's about this bl voice actor who voices a seme and a older man who bullies him a bit. It's a manga with a red cover, I think
http://www.mangago.zone/read-manga/kono_ore_ga_ahe_goe_nante_dasu_wake_ga_nai/this one maybe?
http://www.mangago.zone/read-manga/kono_ore_ga_ahe_goe_nante_dasu_wake_ga_nai/ ?
Yes, that's the one I was looking for
It's about this bl voice actor who voices a seme and a older man who bullies him a bit. It's a manga with a red cover, I think