Unusual Incident in Seireitei?! Gotei 13 Invading Army Arc!

After cleansing and restoring the barriers where Karakura Town was temporarily swapped with the Soul Society, Rangiku Matsumoto and Nanao Ise enter the Dangai to return home, but are confronted by something along the way. Their captains, who have lost contact with them, are worried sick with their disappearances until they suddenly return a day later. Rangiku and Nanao were gone only a few hours and came back directly, which concludes that the time in the Dangai is out of sync with the Soul Society. Mayuri Kurotsuchi conducts a survey of the area with Kenpachi Zaraki assisting as a security escort. Meanwhile, while Ichigo Kurosaki and Rukia Kuchiki go off to handle hollows, Kon leaves to investigate a spiritual disturbance and finds a green-haired girl lying asleep and covered in rags. Ichigo returns home and becomes furious with Kon, who has brought back the green-haired girl. While the survey is going on, Mayuri and Kenpachi are confronted by an intense light emerging from the walls of the Dangai. As Ichigo and Rukia return through the Dangai to the Soul Society, they are chased by the supposedly revived Koutotsu. To save themselves, Ichigo uses his bankai and carries Rukia all the way to the Soul Society, but falls to the ground due to the gradual loss of his powers. Ichigo then encounters Toushirou Hitsugaya and Byakuya Kuchiki, who place him under confinement. A mysterious scientist in a laboratory addresses what seems to be body doubles of Izuru Kira and Nanao.