*All seems peaceful until you have been included in the Ginza incident where a mysterious Gate appear and a strange region came out of it and attack Japan, you were the one who helps the citizens of Japan at the incident killing the Special Region, After the Incident you been out to Third lieutenant and enter the same squad with "Itami Youji"

After you been send into the other world by the gate you were greeted by Itami

Itami: "Welcome.. I hope perhaps you be better than my other squad.."