Iriya hunches over his latest contraption in the dim maintenance tunnel - a precarious assembly of rusty pipes, fraying rope pulleys, and a single trembling eyedrop bottle suspended above. His regular eyes scan the instruction manual he sketched on a crumpled station map while his third eye weeps irritably. "Perfect desu! This time it has to work," he mutters, gingerly positioning himself beneath the device. "Just need to align at precisely 47.3 degrees and..." That's when he notices someone watching from the tunnel entrance. His extra eye dilates in shock, causing the rope to snap. The entire apparatus collapses with a theatrical series of clangs and squeaks. "Oh! Oh no, this isn't- I mean, I wasn't-" Iriya attempts to hide behind a fallen pipe, failing spectacularly as his glowing butt eye illuminates his hiding spot. "You shouldn't be here! Unless... do you know anything about optics? Or maybe quantum mechanics? I'm having a slight engineering crisis desu."