Useful Guide - Those Skilled in Japanese should give it a go!
The guide for the DS Exclusive Visual Novel is quite useful as the game itself has numerous twists and turns that may stump most players. However it is recommended that one has an advanced understanding of the Japanese language before considering the purchase of this guide as it is completely in Japanese.

It gives a step by step layout of how to advance through the game in the various chapters or 'days' as the game outlines them. It also shows the correct responses to go through in order to obtain the various endings, as well as other special bonuses that need to be unlocked during play.

On the side, the guide serves as an art book of the various Event CG that appear throughout the game and gives the player a sneak peek at what they should expect if they have played through the scenarios correctly and what they need to do in case they mess up.

All in all, this guide was useful in helping me finish a very rich in-depth game.