The days pass as they settle into their routine.
It takes him three full days to get another Fitness point, and then a full week after that to get another. His body is hard and muscular now, like he's been exercising for months, but, as Coventina explains, the Fitness stat is broader that just how much you can lift or how many reps you can do, and the more esoteric parts don't respond to exercise at the same rate muscles do.
The alraunes slowly get harder to find as adventurers clear them out.
Each night, when they're all in bed together, the lewd slowly escalates. Outside of their shared bed, Coventina and Eelesia both take advantage of Sky whenever the whim strikes, and Eelesia in particular impulsively kisses Laurent a few times when they're nerding out together. In their shared bed, all three girls, without explicitly deciding to, let Laurent set the pace. On some nights, when he's receptive, they'll fuck each other in front of him, beside him, on top of him one time. Coventina encourages but doesn't push. Eelesia is just enthusiastic about him in general but she's less horny than the other two. And of course Sky is just happy to be used as a sex toy by the others.
Killing the occasional incidental monster during their daily tasks (such as the ones that come up from under an alraune) gets Laurent up to Level 3 during this time, as well. This is a comfortable level to be, in Axel. At one point Luna explains how the leveling curve gets really steep after Level 5, so that's usually where adventurers who aren't dedicating their life to traveling in search of dangerous monsters and quests plateau.