This is not a typical BL series, because it lacks all the tropes that have become lame over the years. The characters are ordinary young people, not rich families' sons and daughters who drive around in Mercedes or BMW cars like in many Thai BL series.

It's rather an LGBTQ+ series about the reunification of childhood friends who lost contact, but little Wen, who disappeared 10 years before as a girl, comes back from abroad unrecognised by her childhood playmates as Amber, a boy.

The mystery unfolds very slowly, step by step for the protagonists as well as for the viewers.

It is a beautiful, sensitive series, with an amazing cast, especially Erek Lin (who played the role of a bullied student in the fantastic BL movie "Your Name Engraved Herein") as Amber, and a beautiful OST (”Butterfly” by Polin).

I rewatched the series several times, and I found it interesting that there are a lot of things that went unnoticed at the first watching, e.g. the meaning of butterflies that symbolise Wen-Wen's metamorphosis to Amber.