Frustrating game for me (actually more VN). There's a great scene, early on, where the twin sisters have just boarded and are playing around in their cabin, and the MC comes in and catches them. It's great, playful, sexy, teasing, funny. That scene alone makes this game worth it for me, but after that.. Well, for a game with so much sex, it's pretty dull.
The story is dominated by the one trope that I call "unearned harem." This is where the MC gets surrounded by eager, affectionate women, and there's nothing he's done to actually obtain this affection. I've suggested to another creator of another game that this is not good, and their response was, "well, that's the way I like it." You can't argue with that. If creators always made changes based on what their audiences wanted, then instead of a racehorse you'd get a camel.
Anyways, so you've this is really, really unlikable MC surrounded by women (some of who are, yes, quite ugly) and going on these sexual escapades with the most contrived tension. Like, during an orgy, the sisters are upset because the MC doesn't have sex with them. I'm not a fan of orgies; they're really hard to make erotic, wether in film, in books, or in VNs. It becomes like choreographing a marching band, and this is no exception. But anyways, that's the pacing of this VN, contrived sex scene, contrived tension, repeat.
But, there are two things that keep me coming back. First, the sisters. They are... delectable. There's something about their appearance I just love. They're unconventionally beautiful, with these very strong, chiselled faces, with roman noses and long, pointed chins, that suggests that, despite their youth, they have a mature sexual curiousity, and are just dying to be exposed to every possible depravity.
And the promise of that scene, early on, in their cabin, that suggested that had the creator taken a different path, and instead of flinging naked bodies at the wall to see if they'd stick, they'd chosen to focus on the MC and the sisters, telling the story of how he reluctantly, but unavoidably gets pulled into their sexual curiosity through a series of teasing hi-jinks and misunderstandings, this could have been really something.
Final note. Many scenes in this game are dark, too dark for my monitor. Others have made the same complaint. It's a criticism I've seen levied at other creators, too, and I find it interesting how resistant they can be to address it.