Shintaro Kisaragi is an 18-year-old shut-in and NEET who spends pretty much his entire life on the computer. On August 14, Ene, an artificial intelligence living inside of his computer, inadvertently causes Shintaro to spill soda on his keyboard, leaving it damaged beyond repair. With no online stores able to deliver a new keyboard quickly due to the Obon holiday, Shintaro has no choice but to actually go out in public for the first time in two years to buy a new keyboard himself. Upon arriving in the department store, however, he ends up becoming a hostage as a group of terrorists take over the store, taking over the security controls and putting the place in lockdown. Whilst sitting amongst the hostage, a peculiar boy comes up to Shintaro, asking him if he has a plan to escape. Taking Ene into consideration, Shintaro replies that he has a plan with a 100% chance of success, provided someone makes a good enough distraction. Surely enough, a big distraction occurs, as monitors and shelves start toppling over, seemingly by themselves, giving Shintaro the opportunity to plug Ene into the security system so she can put it back under her control, at which point Shintaro passes out.