A ghost only you can see won't stop pestering you about a briefcase that turns your house into a war zone. Tomoharu just wants to graduate, but the show doesn't care what he wants. Every faction hunting him has a piece of a bigger secret, and watching him scramble to survive while his dead best friend cracks jokes in his ear creates a friction that carries the whole thing, Misao's presence keeps the mood from getting too heavy, but he also reminds you that someone important is already gone. The mechas feel earned rather than inevitable. This is a show that understands how to stack problems on top of a normal kid until something has to break.
Tomoharu inherited more than just his brother's old house. A mysterious sealed briefcase arrives at his doorstep with no explanation, and within hours, armed groups descend on his home demanding it. Worse, only he can see Misao, the ghost of his childhood best friend, who seems inexplicably connected to whatever's inside that case. Running on instinct and desperation, Tomoharu grabs the briefcase and flees. He has no idea what he's protecting or why multiple factions want it so badly, but the answers matter less than surviving the next day. As hunters close in, he begins piecing together fragments of truth: Misao knows more than she's saying, the briefcase holds power that could reshape reality itself, and his dead friend's presence is no coincidence. What starts as a desperate escape becomes a race to uncover the truth before the wrong people unlock what's inside. Tomoharu must balance staying alive with understanding why his best friend's ghost won't let him simply walk away from this nightmare.