Xeno and Lilith

Short Summary
''Xeno reveals his story on how he met Lilith and why they escaped from Ergates. Meanwhile, Gieve and Charon try to make a deal with Osamu by asking him to hand over Lilith to them.''

Debatable Canon

 * The setting showed in the beginning may or may not house the school.
 * Their academic ranking system/scaling might use differently colored and designed uniforms to symbolize status.
 * student says Xeno is the best out of the research students, implying there are different departments; so this could be a higher-education college or university. However with the way the students act, it is more like an intermediate high school, so their school system would be faster-paced than Mikado City's.