I read a comment on a Japanese forum that the story is:''The story is about (character of Tanihara), who has always…
Looks like I'm not the only one still researching this one XD Seems nice, it'd be interesting to watch one day! The fact that it's VHS only is a problem :/ Tanihara is kinda a legend with all his LGBT-themed projects.
Edit: Now released publicly, you can find it linked below.