Whoa, I think I’ve been pretty lucky in this case lol
Anyway, even though I’ve spent more than a dozen hours on this game and succeeded in unlocking all the scenes in the video maker, I’ve only known that hint to be a hint to summon irene.
Because, except for irene, the rest of the combinations were identified by Brute Force.
I’m so speechless. xD
Sometimes, it may be helpful that I am not good at English.
Anyway,I finally realize that that hint is to open the portal of the past. Thanks man 乃