Although this uses the popular Dante RPG engine, it's essentially an adventure game set in a school, with your main character being the red-headed schoolgirl. Leaving the school transitions to the next day, and the main activity is going around talking to everyone. Something strange is going on, and the local bancho appears the most helpful character. I finished it in about an hour, but I may have gotten one of the "bad" endings.
No documentation files on the image, so unfortunately I don't have a solid attribution to who the developer was.