Ace of the Diamond Vol. 15 (Kodansha, 2018)

They've made it to the final four in the district tournament! And now they head to Jinguu, where they are just two games away from the field of dreams ... !! Their next opponent: Sensen Academy, led by a commander with a long and illustrious record of service, and their pitcher  ""Colossus"" Maki, who bears an uncommon grudge against Seido for overlooking him. Will they be able to overcome this huge wall and make it further into the tournament?!