http://forums.mangaraiders.com/index.php/topic,8849.0.html

This is another arc that sets in the same time as the Soldier Arc but the setting takes place in a Christian high school called St. Joseph and Mary in Washington where Sakuri attends after he refused to join the loyal Genhancer with his brother and friends to fight against the defectors of the US Army who are attempting to cause another World War. Sakuri went there to spend his high school years with his childhood friend, Cherrie, an American girl. The school however has a dark secret, involving with a group of 12 people who are called the Masked Zodiac who wants to purge all who aren't of Christian faith.