I'm of the opinion that the walkthrough should be removed from this thread. It's an entirely different game. It does tell roughly the same story but you will realize very quickly that as a walkthrough for Origins the Vitamin Plus walkthrough is essentially useless to get scene completion, etc.
I'm playing vitamin plus right now and except the cg are 2 whole different games, mostly of the main chars are the same but it changes the bakground, the H scene are far better in the remake since in the first mostly of the scene ends with 4/5 click but leaving the fact that the remake is still not complete you will have much more cg in the first, I don't think the remake will add all the cg since there's no enough time, the game is based in 2 weeks and it is already at 10, still in the remake you might find some unused cg (the dev seem have some kink with smelly dicks xD). Anyway, the remake is surely more fluid but it miss tons of content.
EDIT:
I've nearly end the game (reached the first ending), like i've said in the remake you can watch some unused cg (but you can't see some others) and they are 2 different game, except the begin you will have totally another story, so you can play both and make your own conclusion.
I'd say that the first is a really good game but.. the final chapter is really something depressing and turn upside down the cards, bad... hmm.. both games should reach the same conclusion but hope it goes with a better reppresentation of the game cause well.. i will not spoiler this, i would say only that the moral is really something contort, it start really good but the conclusion is shit..
Anyway.. if you going to play vitaming plus feel free to use the easy mode because the minigames will be really not easy to complete, the first is "mine sweeper" in 120sec with a really big grid, if you know the game you will know that is not something that can be completed with only luck and only if you are really skilled can be completed in that time, the second is "samegame", it should be easy you guess.. not if you have to obtain 2mil points, that's mean you have to do some really twisted chain and play the game who know how much to obtain the right initial blocks, these are the first 2 minigames, anyway are not essential for the main story, than.. story related will be some others, 3 sliding puzzle (4x4 if i'm not wrong), they are not to much complicated if you know how to solve it, but if you don't they are really annoying (in easy mode you will have a grid of 2x2, so just turn around the squares, somehow the first i still 4x4, at least for me, bug? ), the last will be tetris, this one i don't think is that complicated but the high score is a bit annoying and sure the reppresentation of the pieces are not helping cause they are all round and don't keep the whole screen so you can't have a good prospective. Except the first 2, that somehow can be themed in the game, i don't think are places in the right game..