櫻田誠一郎（坂東彌十郎）率いるイニングナイングループの「SBO部（秘密の福利厚生組織）」にヘッドとして就任した根鈴華（倉科カナ）。
今回の対象者はシナリオコンクールへの応募を目指すコーポレート事業部の新垣裕香（ハマカワフミエ）。
共働きで保育園の娘を育てながら自身の夢を追いかけるその姿に、早速バントマンの面々がサポートに動き始める。
一方、プロ野球への情熱をあきらめきれない柳澤大翔（鈴木伸之）の元には入団テストの誘いが来るが…
Nerei Hana (Kurashina Kana) has been appointed head of the "SBO Department (Secret Welfare Organization)" of the Inning Nine Group, led by Sakurada Seiichirou (Bando Yajuro). This time, the subject is Aragaki Yuka (Hamakawa Fumie) from the Corporate Business Department, who is aiming to enter a writing contest. Seeing her pursue her own dream while working and raising her daughter in nursery school, the buntmen immediately begin to support her. Meanwhile, Yanagisawa Hiroto (Suzuki Nobuyuki), who is not ready to give up his passion for professional baseball, receives an invitation to a tryout, but...
