You went straight ahead passing multiple rooms each with a number on the door. You notice three doors that were different from the others. They each have a word on them Germania, Giappone, and Da solo.
Pg 15(alone) Pg (with someone) Pg (with Ludwig): Go through the door that says Germania
Pg 47(alone) Pg (with someone) Pg 30(with Kiku): Go through the door that says Giappone
Pg 46: Go through the door that says Da solo
Pg 13: Go downstairs