Based on summary by Levi (leviosa8) on the LJ Oofuri community.

Kasukabe vs Musashino game continues.

Kasukabe up against Haruna. Batter gets a hit, Haruna looks shocked. Musashino has a meeting on the mound. Next batter gets a hit. Next batter hits a line drive caught, thrown to second, tagged base, then thrown home. Looks like a double play. Inning is over.

Haruna is up. Looks like he hits a homerun! The guys after him apparently strikeout.

Bottom of the 11th inning, Haruna gets them all out and Musashino wins 5-4.

The twins go to Haruna to congratulate him and offer him the data of ARC so that Musashino can defeat them for sure.

Haruna refuses with the argument that he doesn't know how to use data so he doesn't care. But Akimaru says he wants it! Only, they don't know who he is. Akimaru explains and they offer to fax or mail the information to him.

The twins: "Defeat ARC." "And go to Koshien!"

Haruna: "Of course. This year I'll make sure it's Musashino that gets there!"

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Back to Abe and Mihashi. Abe rides his back while Mihashi runs after him - part pof their training. Mihashi collaspes in exhaustion. They return to school(?) and talk to a guy there.

Abe learns about the outcome of the game. Musashino has won at the 11th inning 5-4.

Abe: "So they reached the best 4."
Mihashi asks Abe whether it vexes him, and Abe replies that of course!
He can't go up the stairs with him, so he'll wait for Mihashi to change.

Mihashi wonders if Abe is only vexed or if he's also in awe and happy for Musashino.
Then he considers that

"If Abe-kun had been..."

"...Playing in Musashino instead... He'd have reached the semifinals with Haruna-san..."

"So if Abe-kun is vexed it's not because Haruna-san has won, but because..."

Abe stands around angruly wondering why Mihashi's taking so long!