It's a harem game after all. If you choose to romance them all, those sorts of things are bound to happen to a greater or lesser extent. You can always choose not to.
This was a huge part of the reason I loved the game. The harem aspect is my favorite. I just wish there was more content on the island at the end! Just a sandbox of lewd scenes with the love interests. Building the harem should have an epic payoff. Looking forward to more content for this game in the future!