@dmr11 you are exactly correct.
Actually, this manga took this a step further by (and this is all from the first chapter so slight spoilers but I wont mark it because this might just save you from reading this train wreck) literally having the vocalist stop the boyfriend from kissing the girl without her permission and then literally the next day vocalist dude kisses her without her permission.
OH, don't forget having a teacher kiss a student is bad. She could be a 3rd year and maybe if he is early 20's then maybe I'd accept it but this is still inappropriate.