Life: Senjou no Bokura is the kind of story that I would totally recommend to anyone who likes BL. I read it with high expectations and I was not disappointed, just the first chapter was enough to made me think "wow, this manga is awesome".
The story is simple, but I wouldn't say it is cliche, quite the contrary, one of the points that surprised me the most is that it is very creative (especially the way they met) for a story that shows the normal life of a couple. Another point that I liked and want to mention is that this is a story with lots of happy and sad moments, it will make you laugh and maybe cry (well, I cried a lot).
I don't have much to say about the art, it is also simple, without many details, but still beautiful and you can easily identify what is happening. Unless you are a person who really cares about details and only like those super amazing art styles, I don't think the simplicity of the art will be a problem.
About the characters, well, there aren't many, in fact, the story only focus on the couple, so others only appears in specific moments. Talking about the main characters, their personalities are loveable, I especially liked Nishi's, who is very child-like, Itou is more serious, but he also acts like a child sometimes.
To sum up, this manga is totally catching from the beginning to the end and I really don't think you will regret reading it.