Shun who has awakened his ability is scouted by AEGIS. That means that he should transfer to Tategami School, where AEGIS base hides. Transferring to Tategami means he would be living in a dormitory, away from his family. He hesitates because he does not want to be like his father who dies neglecting his family. However, Invaders appear in Shinjuku where his mother and sister are. Shun rescues them then makes a decision.
From: A.E.G.I.S. Files - http://www.geocities.com/aegisfiles/index.html
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