If you really want to get into the genre learn Japanese as another anon says but there's a good few translated games out there. People seem to like Code Realise and CollarXMalice though they're only available on Vita.
For PC games the Psychedelica games seem pretty popular. Personally I'd recommend Taisho Alice too but only the first part is out, but having played the whole series in Japanese I can really solidly recommend it. Gretel is the far superor cage husbando, sorry Toma.
If you're bothered to use emulators the Tokimeki Memorial Girls Side games are fun and all have fan patches to my knowledge.
There's also some PC games with fan translations you can find with a bit of searching, Ayakashi Gohan which I haven't played, the Dot Kareshi series which are short RPG themed comedies, Princess Nightmare where you are an immortal loli vampire who starts going to school to find boys to prey on (it has very shady 'blood drinking' scenes) and Heart no Kuni no Alice which has dreadful art but I enjoyed well enough. There's more I've probably forgotten.