Kuramochi Youichi

When Eijun's twin sister, a dead ringer for Nekoma's brain, shows up at an Akikawa match, the Seidou baseball team is about to discover that chaotic energy runs in the Sawamura family.

You confessed to star catcher Miyuki Kazuya from Diamond no Ace the night before championships—he rejected you, but now you're stuck together on the team bus for a week.