Responses
Saezuru Tori wa Habatakanai: Don't stay Gold is just an OVA that covers Kageyama and Kuga's first meeting. From what I've seen on Twitter we get the smut in the movie, which has a R18 rating.
oh my! I envy you for seeing the movie... Now it makes me too anxious to wait several months more!!! ╮(￣▽￣)╭
the first movie covers till mid chapter 8.
2 more movies have been announced yet and without watching the first movie i can tell you i am not ready.