You are entering the vicinity of an area adjacent to a location. The kind of place where there might be a monster, or some kind of weird mirror. These are just examples; it could also be something much better. Prepare to enter The Scary Door.
Ichi checking on Ni and trying to get San to pay attention for five seconds and lock in is so older sibling coded I almost busted out laughing in the theater. Dude is so tried of their shit frfr. Ichi: If we weren't attached, I swear to god-