Responses
This isn't based on a novel, but there is a pre-serialised version of this manga here: https://www.mangago.zone/read-manga/oni_ure_idol_ga_kyou_mo_watashi_wo_oshitekuru_pre_serialization/
The romance seems to be more subtle, but it is 100% a GL, not a yuri bait at all, don't worry!
TYYYY
GUYYYSS IS THERE A NOVEL FOR THIS?? IF IT DOES SOMEONE WHO HAS READ IT BEFORE PLS SPOIL IM BEGGING im real scared it’s gonna Yuri bait me and then I’m just gonna read the final chapter of this one day in shock and despair