Shugotate - One of the two series that gave life to a curiosity sub-genre, the trap protagonist. In this case, it created the 'combat-capable trap protagonist in a plotge' sub-genre, which turned out to have a weird life of its own after this came out. A complete remake recently came out, with mostly aesthetic upgrades, though I haven't really played it yet. This game has all the elements you would expect of the genre, from the protagonist constantly worrying about getting caught while being disappointed no one realizes he is a man, as well as the comedy, characters, and writing of an AXL game.
Ouzoku- SofthouseChara's most famous game. To be honest, this is one of those Rance-type games with a good story despite the fact that the protagonist is the worst kind of womanizer. The gameplay is decent, but it is somewhat reminiscent of Langrisser, with the need to heavily budget-manage as well as put out units that can be effective on the individual battlefields you are deploying them to. As such, it is not in any way suited for beginners to turn-based tactical gameplay. It also doesn't have a decent tutorial to help you learn the ropes, so most people will end up restarting from the beginning after running out of money partway through.
ExE- Yuzusoft's first chuunige. Actually, its only chuunige. It is very much a representative of the early genre that was born with Tsukihime, with a school-going protagonist who suddenly begins to get powerful rather than having any skills of his own previously, a seemingly devious plot that the protagonist stumbles upon by accident that somehow has deep links to his tragic past, and heroines who mysteriously fall for him inside an hour of gameplay. In other words, it is a decent game, but it has all the flaws of the early chuunige genre to annoy the experienced while probably being one of the easiest entryways for people new to untranslated to try the genre.