Matsumori Days is the first in a series of three games that focus on storytelling. With this game, it centers on the trials faced by six high school students as they find themselves trapped in some rather unique extracurricular activities (Yeah, let's call them that). Combat is of importance to the game, but, don't expect to see anything exciting happening with it.
The game's resources are all over the place, to be frank. The game has roots as far back as 2002 (Though, to be honest, it was a rather vague idea back then), and the RPG Maker 2000 engine. It's "RTP add-on" being where the portraits the game uses are from (Which means I have no clue who actually made them). A boss or two use battlers from RPG Maker XP. The Famitsu site was used to make the character sprites for the main cast, and the various students and teachers found in the game. To top it all off, there are a number of ripped songs from commercial games. If any number of these things offend you, you'd do well to stay away from this game.
Screenshots:
Spoiler

A typical classroom.

Toshie being spontanious.

The entrance to Matsumori High. You'll be seeing this. A lot.

Introducing the antagonists!
-About 4-5 hours of gameplay!
-A focus on storytelling!
-Crappy attempts at puzzles!
-Weird difficulty curves!
Download Links:
Via the RPG Maker Net download page
Other links of interest:
This game's gamepage on RPG Maker Net.
The second game in the series (it's a prequel to this), Arbiters From Another World. Visit the RMW game-thread here!
The third game in the series (it's a sequel to this), Konae's Investigations. No page here as of yet.