Gakuen Senki

About
Gakuen Senki is a game developed by Champion Soft and follows the story of Ogawa Kentarou's brother, Wataru.

This technically means the game is set in Dimension 3E2, though that's not likely to be canon.

This game had a small follow-up in the form of 2 small ADV games included with the Alice CDs, Gakuen Hyouryou Senki and Gakuen Hyouryou Senki 2.

Gameplay
This is an ADV game and uses a system much like Little Vampire.

Instead of having to type or having to do both selecting and typing, the game now solely uses a menu to issue commands.

Story
The game takes place in a giant school site which might as well be a city and it follows the exploits of student council member Ogawa Wataru.

You end up doing various tasks for the students, but you keep running into odd things. Can you figure out the school's mysteries?

Walkthrough (Japanese)
I couldn't get past the science room. I needed to check a notebook, but I don't seem to have the option.

If anyone ever makes it, be sure to note down what you did or did differently.

The walkthrough is in Kanji, but the game is in Kana. You can convert it, but there should also be a version of the same walkthrough in kana.

Link

There was also a full hint booklet around if you mailed Champion Soft some money, but I doubt that'll ever pop up.