"August 21, Part 3" (八月二十一日③ Hachi-gatsu Ni-jū-ichi-nichi ③?) is the 35th chapter of the Toaru Kagaku no Railgun manga series.
The chapter opens with Mikoto explaining her plan to Touma; She'll lose to Accelerator on the first move, making the researchers of the 'Level 6 Shift Project' believe there was an error in calculations. Because the 'Tree Diagram' was destroyed earlier, they can't make recalculations. Mikoto starts walking away, but is stopped by Touma, who refuses a person to enter a fight with the intention of dying. Mikoto destroys the document in Touma's hand as a threat.
With Touma still refusing to get out of the way, Mikoto challenges Touma to a fight. Instead of entering a stance, he puts both hands up, much to Mikoto's surprise, saying that he won't fight her. Mikoto, enraged by Touma's idealistic outlook, attacks him. Seriously injured, Touma's steaming form stands up, telling Mikoto that he won't move aside because her plan won't save the Sisters. Mikoto shouts at Touma, arguing that she doesn't have the right to live in this world where she created the Sisters (And therefore their deaths); Touma rebuts that the remaining Sisters will not see it that way and that they will not be saved that way. Mikoto's desperation and anger over her actions escalates, with her recalling Misaka 10031, and when Touma refuses to move out of the way, she attacks a large explosion.
Touma wakes up in Mikoto's lap, with Misaka 10032's cat mewing on the side. Mikoto cries a little in concern, some tears landing on Touma, and he smiles, saying "How great it is to be your ally". He gets up, telling Mikoto his plan of fighting the Accelerator, destroying the image of the Accelerator being the strongest Esper. He promises Mikoto that he'll bring back "Misaka Imouto", to a crying Mikoto.
Still injured, Touma runs all the way to the dock, seeing a heavily injured Misaka 10032 on the floor, her goggles broken. Misaka 10032 questions Touma's presence, but Accelerator stomps her head back into the floor; The chapter ends with Touma shouting at Accelerator to move away from "Misaka Imouta", aggravating him.
Adapted from? which chapter of novel
refs to previous chapters
In order of appearance: