You don't need to have the twintails effect equipped in order to open that door (it reads like you do need to have it equipped) and in order to see the redhaired NPC, you need to have the glasses effect equipped. That female redhaired character runs away from you when you have the glasses effect equipped because that is how the blue haired male NPC wants to be identified as and doesn't want anyone to know. So the bluhaired NPC is either transgender, or likes crossdressing.
Also, if you equip the boy effect, the blue haired male appearing NPC follows you. If you equpi the invisible effect, the blue haired character looks around the room then slowly transforms into a female.172.112.144.39 05:28, July 16, 2016 (UTC) 172.112.144.39 05:22, July 16, 2016 (UTC)
You're thinking about the wrong door, that's seishonen's room under the stairs. The door that requires the twintails effect is the first in the corridor on the right and leads to the room with invisible floorboards. LainIwakura (talk) 06:56, July 16, 2016 (UTC)
