Starts in modern time with MC's girlfriend is cheating on him, he catches her later in a bar with her friends and another guy. The guy gives her an std and its been passed around to a bunch of other people. The MC I believe saves an old man or something and somehow he is transported to a medieval time with magic. MC comes across a group (4-5) women who are mercenaries and he joins them on their quest. I believe it is a series of 3 or more stories all told where he joins them on other adventures and they are waiting for him to pick one of them to marry. Any help would be appreciated.