Episode Title:
Big Sister (Mikoto Misaka).
Episode Description:
A girl resembling Mikoto and wearing military goggles uses a sniper rifle to shoot a teenager named Accelerator, only for the shots to be reflected and her to wind up face-to-face against him. Töma runs into Mikoto at a vending machine and they are caught off guard by her köhai named Kuroko Shirai. After Kuroko teleported away, the two encounter another girl that looked exactly like Mikoto, who identified herself as her younger sister and referred to herself as Misaka. A frustrated Mikoto leads Misaka away despite the latter's objections, though Misaka approaches Töma later that day and helps him carry tin cans...
