My Hero Academia: Vigilantes Vol. 8 (manga)

Captain Celebrity and Koichi gave it all they had to hold off the explosive attacks set up by the mysterious high-speed villain. But now, as the Sky Egg stadium plunges earthward, can anyone save the day? And just who is the sinister speedster? What is his connection to Knuckleduster? Koichi's mentor still has a lot of secrets he hasn't told anyone. Later, Aizawa helps Koichi deal with a minor villain and the encounter triggers a memory from his youth...