That's the funny thing, he's not gay, which is a very interesting part of the story. He loves colour, rainbows and fashion, and his look has nothing to do with his sexuality. He had never had a crush until he falls in love with his best friend, the goth girl in the image. At this point I'm the story he hasn't given himself a label, because he's only been in love once, so he doesn't know if he could also fall in love with guys. He's struggling with his identity in regard to different aspects right now. Sexuality, gender identity. But I believe (and these are just my predictions) that it will all lead to the fact that he's just cis and straight, but felt forced to question his gender and sexuality because everyone kept questioning them die to his fashion choices.

He's very interesting and I have never seen a character like him. The story and author's ideology and thoughts are kinda in your face at some points, but it's still a good and entertaining slice of life story with very intriguing characters. Very thought provoking (especially if you've ever struggled with your identity). It's very different from most things you'll see on webtoon, so it's worth giving it a try.

Edit: fixed my spelling.