Sure, I get it. I just know that there is a lot of actual ethical considerations this would create.. the off ramp being he is also a high schooler, and classmate of the girls...BUT his ALSO being their boss... and then they being vulnerable youth, would, in many jurisdictions, still be something which possibly overrides that. These are school girls, who even at 18, would likely NOT be classed as independent from their parent(s) or guardian in my jurisdiction, who are also in compromised circumstances, and as I said, would be classed legally as vulnerable youth at risk in my country.
The expectation of propriety, and morality, in MY culture, would be HE DOES offer them that safe space, and help, but DOES NOT accept Romantic intentions, or sexual engagement, in return. Rather, explicitly avoiding that, at least for more than a month. Once they are out of school, and if they find other work, which is their primary source of income, and move out... THEN proceed with romantic explorations, then move in, take jobs again, and it proceeds along those lines... THAT would be seen as OK.
Offering them shelter, work, support, and safety, but then also spanking them, touching them sexually, taking oral sex from them, and even having intercourse with them, even if mutually consensual would be VERY problematic, and that definitely informs my view of the game.
As for the sex scenes.... I am a glutton... I want lots, and tbh, expect somewhat more than we have in any game this long.