
of course, i think it could've been written a bit better but i don't feel like he acted in a bad way when he found out Kiumi got assaulted?? It's not like Koh was a total stranger. He was worried for Kiumi but at the same time Shizume probably felt a bit betrayed by Koh. Shizume was very obviously upset and confronted Koh about it. And i feel like it makes sense with who Shizume is as a character too. As for the flashback scene i again feel, yeah, it could've been written a bit better but prior to those events they were still bestfriends. It wouldn't be totally farfetched to assume they'd still be friends as Shizume was also curious about his sexuality and Koh was the only other gay person he knew.
I don't think it was badly written. And i think sometimes you need to think a bit more than just "He was sexually assaulted/his boyfriend was sexually assaulted so he should be furious." Of course he was upset, it was very clear in my opinion. But he also wanted to talk to Koh about it right away.

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

"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.
I LAUVV IT I LAUV ITTT