CONTENT WARNINGS: Homophobia, sex, p*dophilia, r*pe. No genitailia is shown but it's quite graphic aside from that and the story focuses heavily on sexual abuse. The characters that engage in sexual acts are 14.
The story follows Serge, a new student at a prestigious French academy, his roomate Gilbert, and the development of their relationship. Gilbert is a boy who has frequent sexual relations with adult men, a response to being groomed from an early age, and something he is shunned for by other students. It's mostly a story of Gilbert told through the eyes of Serge. It's diet Banana Fish.
Story: There really wasn't too much story. It's an adaptation of a 17-volume manga and thus a lot is left out. I've never read the manga but I assume it would fill in some of the large blanks in the OVA. There are some interesting moments but the movie just leaves a lot to be desired. For the short time it has, it's not terrible. If you're looking for a happy ending, though, this one isn't for you.
Animation: not much to say on this, it's alright for its time and the style isn't too bad.
Sound: some really awkward sound effects. A few montages with music in them are drawn out and boring.
Characters: the characters are pretty interesting. You're still able to understand some of their dynamics and their places in the story, but they just aren't explored to the extent I'd've liked.