Yuri and Kei are given accommodations at an all-girls boarding school from the 20th century. Yuri finds the life as an exchange student a lot of fun. Kei could care less, until she learns about some ghost stories about the school and experiences some of the horror.

Kei and Yuri discover a con man named Calbee posing as a trouble consultant, and chase him down in an attempt to get enough reward money to afford dining at an expensive French restaurant. The pursuit lands them in the outdoor areas of World's World. Calbee tries to charm Yuri while looking for opportunities to make his escape.

On the last day before the spaceport reopens, a bomb destroys Touma and the girls' residence. Kei and Yuri assume their bodyguard positions again. Touma attempts to isolate the location of the perpetrator, but everywhere they go, more androids continue to threaten Touma's life.