First off, what's very unique about this visual novel is that you're not playing a plain jane protagonist who who has limited social skills with women. You're playing a lazy dude who lives paycheck to paycheck and prefers being a lone wolf. He does have hidden power but that doesn't make him into the most overpowered character in the entire story. He has to be aware of both his limitations and use his wit to overcome obstacles. That in and of itself makes this unique among Japanese visual novels and makes this a breath of fresh air.
This is a detective story that is primarily episodic. There's an underlying main story, but you have to go through each of the routes to get a full background as to the MC's motivations. If there's anything that makes no sense, it's the romance. The MC is essentially an asshole who could care less about forming meaningful relationships so the lovey-dovey romance he has with the women feels very out of place with not only his character, but with several of the women too since most of the women wouldn't even date a guy like him. Instead, the hentai is there just to be there. You could have remove the forced hentai and still have a coherent story here.
Another warning is that if you hate games with a cliffhanger, avoid this one because by the end, it's very clear that we are far from finishing the story. There's a lot of world building. The story isn't mind blowing, but it's definitely intriguing.