High School/School themed visual novels are a tale older than time itself, due to his roots on most of the japanese visual novels of the past, and it's easy to understand from a japanese perspective, since is the time of the life when you're kinda free (hence why we have dozens upon dozens of slice of life anime shows with school theme), but still is overused.
College in other hand, is a more complex situation in terms of adult visual novels, since isn't the same as school, so a more sensible approach is needed. While some authors try to do the same school approach (and fail to capture the more cynical nature of university), some try to do their work akin to the real life, with their own twist. This approach have varied degrees of success and failure, and fortunately, A Man for All try this approach instead of School with adult people. For those of TL;DR: A Man for All is Fuckin' Fantastic.
For the others, well, you might be askin why?
*tap various parts of my body*
Here's why:
Story: You're a guy in his early twenties, that was always a good student, and after high school, go to the big city to attend a prestigious university to study psicology. After 3 years of online classes, living in the basement of a coffee shop (where you work), you need to attend classes to work on your thesis. And that's where your journey begin, meeting different people, balancing studies, work and even some other activities, while also working your way into the women.
While the premise is kinda basic, the story progress isn't. You meet various people and deal with a myriad of different things.
Remember when I talked about success or failure in show college stuff? Well, AMFA excells at this.
Writing: It's excellent, some people can complain about some "useless choices", but those are IMO, the best part, because you can shape what kind of relationship you have with the different LI's in the game (of course, as a Harem enjoyer, I have the Pokémon approach of Gotta fuck'em all), you can be a Gentleman, a Funny guy or a Carlos SainzSmooth Operator and in more decisive situations (usually not relative to LI's but on the story) you can be a Diplomat or a Agressive in relation toward those situations. The characters, being LIs or not, are unique and not always jump on LI's pants (Erika being the exception). And Vanessa is the best girl, don't @ me.
Art/Sex: While is kinda sad that some people get more love than others, the girls are good, with Milfs looking like milfs and younger people looking like younger people. And the sex scenes are good, despite not having that much of a dialogue compared to other AVN's.
Overall: 5/5. Why didn't you played yet?