Chapter 324

Let's Go Play at the Mangaka's House (7), originally The Reason for the Hairstyle! in the WSJ release, is the three hundred twenty-fourth chapter of the JoJo's Bizarre Adventure manga. It is also the fifty-ninth chapter of Part IV: Diamond Is Unbreakable.

Summary
Rohan continues to insult Josuke's hair until Josuke approaches to punch him. As soon as Josuke starts his punch barrage with Crazy Diamond, Rohan shows him a page from his manga, which he ignores, and Rohan ends up hit by Crazy Diamond's barrage.

Koichi says that even though his eyes are open, Josuke's anger made him unable to see clearly. Rohan says that this was a part about Josuke that wasn't in Koichi's memory and asks him why Josuke gets so angry about his hair. Koichi explains that when Josuke was a child, he got a strong fever. His mother tried to drive him to the hospital but got stuck in a blizzard. Suddenly, a man wearing a school uniform helped them by pushing the car and putting his uniform under the car's wheels so they could pass over the snow. The student then took his uniform jacket and walked away. The only part of him that Josuke saw was his hair, and his current hairstyle is a tribute to the mysterious man.

Rohan grabs a pen and starts to draw, saying that it makes a wonderful story. Josuke then spots him and continues punching him.