あらすじ
Thirteenth episode delivered as a bonus Blu-ray disc to customers who pre-ordered all six Blu-ray volumes.
あらすじはAniListより（英語）。
完結
Ushinawareta Mirai wo Motomete: Ushinawareta Natsuyasumi wo Motomete
Romance
Thirteenth episode delivered as a bonus Blu-ray disc to customers who pre-ordered all six Blu-ray volumes.
あらすじはAniListより（英語）。