i think you skipped a few steps. i dont know how to even get a single centimeter of Rye's heart thingy to be filled when you talk to her. i've danced with her but she just doesn't care.. 3 stars all the time.You can get a bad ending with Diamond and her friend raping MC on Rye route.
are you talking about the bad end route in the bar when you walk into it for the first time?? that one i know of ofc, besides that i know nothing more. can you even increase Rye's affection??