In the not so far off future the amount of rebellious teenagers and trouble making delinquents are rising. To deal with this the Japanese government decided to round up all the high school students who had multiple run ins with the police and/or had major expulsions from school, and put them all in a giant high school...
The "Guardian Angel" was a being unknown to the people of Solciud. It was someone or something that went about saving people and helping the community itself. Some people called it a blessing, some a curse. One day, this being up and vanished and hadn't been seen in 3 years. Now, a new girl arrives to the high school...