That’s it. This is the explanation that most people fail to understand. I'd suggest this movie to anyone who has just begun to step into the world of BL as I've several people cheer over gay people portrayed in media, yet say that they are against LGBTQ+, which is inhumane.
I do not know how much Taiwan has changed in the past few years, but this one was brutal to watch. This is more of a slice-of-life-amidst-crisis kind of movie, so if you are expecting some "wholesome" story with a neat ending a strong plotline... let's just say gear up.

Narrated to the Priest of their school by a boy, A-Han, the love story between him and a delinquent student Birdy, is slowly revealed. However, in times when homosexuality is considered a sin, how will the two manage to prove that their love was worth it?
I’ve decided that “Bestfriends to lovers” trope is one that I hate, but still torture myself with cause these kind of stories if portrayed well, manages to convey emotions like a punch in the gut.

It was difficult to watch for a number of reasons. There is a point in the movie where we see the gradual shift in its tone as both the boys try to “normalize” their lives, then there are the frequent inner conflicts of the characters that we feel through the screen, particularly due to the outstanding performance by both the leading actors.
I think the final scene of them as teenagers was the nail on the coffin for me. There are questions raised and Morales challenged, which is necessary.
The main song “Your Name Engraved Herein” was beautiful to listen to.
There were intense "NC" scenes that were a bit difficult for me to watch. But, kudos to the actors for being able to depict such intense emotions seamlessly.
Definitely worthy of a watch, even if it hurts you.