I skipped the Even-leaving-the-hotel-entirely-naked bit because that’s when we all knew what was going on, even before Sonja came up and said something. I’d like to mention this part tho, because Sonja said something that hit Isak.
She was basically implying that Even’s feelings for Isak weren’t love, but mania. People who are aware of bipolar disorder know that this couldn’t have been true. But Isak, a 17 year old, who has only faced the mental illness of his mother before, did something every 17 year old would’ve done: He believed her. At least for the rest of the night or the weekend, Isak spent wondering how much truth there was to Sonja’s words.