Chapter 398

Toshinori Yagi: Rising/Origin (：ライジングオリジン) is the three hundred and ninety-eighth chapter of Kohei Horikoshi's My Hero Academia.

Summary
As All Might engages All For One, a device ejects from Hercules nearby, which All Might stabs directly into the Villain, releasing the "Superacid Injection: Pinky". The acid starts to effect All For One, angrily yelling as All Might shouts that he's dissolving away after rewinding some damage, laughing at him for calling him "trash".

In the past, young Toshinori Yagi asks Nana Shimura to take him on as her pupil, but she refuses telling him he doesn't even have a Quirk and to take his pipe elsewhere. Toshinori responds that his family was killed a while ago, with Nana simply responding so was her's and she doesn't have time to help seek revenge. Toshinori says that he just can't accept a world where those who take from others come out on top, the grief of those who have been stolen from turns to hatred in an endless spiraling cycle.

Asking for his solution, Nana turns around and is surprised as Toshinori continues to state how he wants to live in a world where everyone can smile, for that, the world needs a "Symbol of Peace". He points toward the destruction nearby noting that even with new buildings and restoration efforts, people have been living in fear for a while, with their hearts and minds shrouded in darkness. Nana asks if he would put on a grand display of power, and he responds that everyone has it tough with their own problems so he would step up, because a Quirkless guy like him has no role otherwise.

In the present, the battle ends up in Tatooin Station, as All Might is once again flung backwards through several buildings, and crashing on a rooftop. At the Counter-Force HQ, they point out that All For One has gotten closer to U.A., but he's veered off course, completely focused on chasing All Might. The suit informs him that he has fractured ribs, full body contusion, and his respiratory system malfunctioning.

All Might spots the rooftop where he first met Izuku, thinking about the words he said to him, as well as Stain's words which also echo in his mind. He does everything he can to stand as All For One once again appears above him. However, All Might notices that All For One has gotten younger, unsure if he himself has noticed, meaning he needs to make sure he doesn't come to his senses. He realizes he had to use Quirks to remove the Pinky Acid from his body, but the strain is hurting him, figuring taking damage is speeding up the rewinding process.

Just then, All Might begins to manically laugh, louder and louder, further inciting All For One's rage, shouting for Hercules to send the remaining parts of the suit to him. All Might activates the Thrusters: Uravity and Ingenium at Full Throttle, declaring how much of a joy it is to be of service to others, and "together" they will win to victory.

Meanwhile, as Deku and Tomura's battle intensifies, the vestige of All Might within One For All senses the battle nearby.

Chapter Notes

 * More from All Might's first meeting with Nana is shown and how he convinced her to take him on as her pupil to become a "Symbol of Peace".
 * It is revealed All Might's family was killed sometime in his youth.
 * All Might uses the Superacid Injection: Pinky to pump All For One with acid, speeding up his rewinding effect.
 * All Might activates the remaining parts of the Armored All Might, including the Uravity and Ingenium Thrusters, all while manically laughing to keep All For One distracted.
 * The vestige of All Might within One For All senses the battle nearby, as Deku and Tomura continue fighting.