イベント１部に所属し次期エースとして働く浅井（前田旺志郎）は、イベント３部の解散話を耳にする。解散に納得がいかない浅井は、３部存続のために動き始めるがなかなか上手くいかずにいた。一方で、璃子（与田祐希）は大石（中島歩）が会社を辞めるという話を聞き、ショックを受ける。
２人はお互い同じ理由で落ち込んでいると勘違いしながら、協力して最後まで頑張ろうと約束をする。そして、大石のアドバイスのおかけで３部解散の解決策を模索する浅井だったが、異動の話がおりてきて…
Asai (Oshiro Maeda), who belongs to the event division 1 and works as the next ace, hears that the event division 3 will be disbanded. Unsatisfied with the dissolution, Asai begins working to keep Division 3 alive, but things are not going well. Meanwhile, Riko (Yuki Yoda) is shocked to hear that Oishi (Ayumu Nakajima) is leaving her company. Both of them misunderstand that they are both depressed for the same reason, but they promise to work together and do their best until the end. And, thanks to Oishi's advice, Asai was looking for a solution to the dissolution of Division 3, but there was talk of a transfer...
