How do I learn to read Wapanese?

Some crazy fellatio going on in that series...

ah Lilith, if you ask me they have the best eroge. I understand your plight all to well. However I myself am quite lazy and have not gotten around to trying to learn the language.

Crazy in a good way?

im trying to learn japanese it's so fucking hard

Now I'm interested...

Fish face sucking LOL ^__^

Start with the alphabet. Katakana and Hiragana.
Basic phrases should be easy to understand but Kanji will take you years, most probably, an english version of that VN already appeared before you can even read a Japanese newspaper.