Asymmetry is definitely a Japanese BL of the 2000s; as in it doesn't have a happy ending.

While it does a great job of portraying a realistic gay love story from it's time, I found it quite boring. If you like slice of life dramas and enjoy the realism then it might be a nice movie to watch, but for me it was boring. While realistic, there was no real hook to keep watching the movie. The love story was very unoriginal and even the characters were quite boring. It was quite obvious that the movie was going to end the way that it did from the beginning.

I guess if you're looking for an actual love story in a BL, then this is not the movie for you. If you are looking for a very realistic, slice of life, unrequited love story then maybe this might be for you.