
"Whatever the genre tag is, and even if this story isn't a romance, as the author, I guarantee that it is a queer story.
There seems to be a persistent false rumor going around that "the author suddenly removed the BL tag from the official website by the 3rd volume," but the truth is that there was never an official BL tag from the beginning. (This is not to deny any queerness.)"
Words of the author from bluesky.

While “Hikaru” is not human there’s an obvious theme that indicates him as “otherness” to the people around him. This outright horror and unknown nature he shows could be a representation of queer people who are often labeled as ‘abnormal’ and ‘non-human’ in culture as homogeneous and homophobic as Japan, not to mention in rural town too.
Yoshiki’s disgust and fear towards ‘entering’ this “Hikaru’s” insides, and his conflicting emotions towards Hikaru in general gives me the vibe that Yoshiki has some indication of internalized homophobia. Him “entering” Hikaru is also a very good representation of fear and horror of intimacy and sex to me. At least that’s how i understood it.
Lord i am not ready for this to be animated cause i'm already seeing a bunch of people on twt deny that there's anything queer about this sure it might not be explicitly BL but please it's as clear as day that there's a bunch of queercoding in this