In fact, this is a deep conflict, and you can delve into it endlessly and pointlessly. Just let it go, accept it as a fact, and move on.
Maya. In the first lesson, she said, -"I'll call my boyfriend". So the others would hear and not ask her questions. While they were watching a movie, she said, "I don't want you to fall in love with me." Then she said she didn't have a boyfriend. Then the topic of Maya's bisexuality came up.
We also don't know what happened when Tremolo returned drunk to Maya's room.
Tremolo managed to become friends with Maya, and that's precisely why he was upset with Josie, because she was cheating on his friend with him. He was obviously upset with Maya because she said she didn't have a boyfriend.
And when Tremolo found out about everything, he was even more upset that they were cheating. And so a love triangle formed. Well, and perhaps he was also hoping that when Josie arrived she would break up with her "boyfriend" and she and Tremolo would be together.
In general, Tremolo had reasons to be offended.