My first VN was... Tokimeki Memorial on the PS1, imported some games from Japan and one of them that I never heard about (internet was still not filled with many info on this kind) was this one. After that I purchased Da Capo (JP edition, around 2002-03). And wow, never thought they would do sooo many sequels and spinoffs of that series, but... I guess it prints money.
-rockleevk