Let's get first things first: there's A LOT of sex in this film (and by A LOT I mean about 2/3 of the film). However, surprisingly they aren't too obscene and there's even something a bit naive about them, quite a change from some recent Japanese gay movies (if you've watched any of the Saitankyori wa Mawari Kudokute films or Sei no Gekiyaku, then you know what I mean).

However, these scenes exactly are the problem of the film - they are not sexual enough to turn it into a porno (at least, in my opinion), but they are not interesting enough to become an essential part of the story. I think that if some of the sex scenes were cut and others added with some more lines in them, it would have been much better - for example, the relationship between the protagonist and his sister, or the protagonist's personal love story (which we just get a glimpse of at the end) .
The other option was to go full-on porn mode and just make the scenes as explicit as possible. The current result feels like a bit of a mess. Maybe I misunderstood the genre, but that's what I think.

The acting was good, I think, though sometimes during the sex scenes... I don't know whether the main actor was extremely uncomfortable or just bad at pretending to have sex (the tongue, bah).

The visuals are stunning, and combined with the eternal sound of the Japanese cicadas, I actually felt like I was in Kyoto during summertime.

Probably wouldn't watch it again. 7/10 and I'm being generous