Shukusei no Girlfriend is the first of three games in the series, based in a world where mahou shoujo-like girls calling themselves Stars fight demons to protect humanity... a pretty standard setting that, in most games, would mean lots of tentacles, aku-ochi, and general mayhem that would range from the mildly distasteful to the outright disgusting. While in anime (non-hentai) most mahou shoujo are fairly straightforward and rigidly formulaic battle anime, in VNs, mahou shoujo usually end up on the wrong side of tentacles and/or monsters in the worst kind of way. Shukusei no Girlfriend, however, is neither... it is essentially a series of live-together rom-com vns.
This one focuses on Yuuri, the genius wielder of light magic whose power is only matched by her arrogance, laziness, and narcissism. Normally, she puts on the face of being your standard 'pleasant to everyone' girl, but when in her Stars form, she shows her self-worshiping face as she exterminates massive numbers of Demons with her powerful light magic. Unfortunately, one night, she gets mortally wounded while failing to protect the protagonist (Seiji) and their lives get linked together... and they can't go more than a meter away from one another without dying. Yay! A perfect excuse for a live-together rom-com!
Anyway, Yuuri is a bit of a misandrist, and at first there is a bit of mild domestic violence. However, the game soon shifts to a mix of ecchi, Yuuri being hilariously arrogant and occasionally showing her weak points. Generally speaking, the actual plot of this game is nonexistent to weak, but it is a generally amusing experience with nice ichaicha, an excellent cast of equally amusing female character, and a great ending (I love ten years later endings).