The Spring Unit Festival is the first day of the "Hinatazaka46 Debut 2nd Anniversary Special 2days" event. Songs picked by fans were performed and live-streamed from a concert hall without an audience.
| Actor | Role |
|---|---|
 Sarina UshioHerself | Herself |
 Yuka KageyamaHerself | Herself |
 Shiho KatoHerself | Herself |
 Kyoko SaitoHerself | Herself |
 Kumi SasakiHerself | Herself |
 Mirei SasakiHerself | Herself |
 Mana TakaseHerself | Herself |
 Ayaka TakamotoHerself | Herself |
 Mei HigashimuraHerself | Herself |
 Miku KanemuraHerself | Herself |
 Hina KawataHerself | Herself |
 Nao KosakaHerself | Herself |
 Akari NibuHerself | Herself |
 Hiyori HamagishiHerself | Herself |
 Suzuka TomitaHerself (voice) | Herself (voice) |
 Konoka MatsudaHerself | Herself |
 Manamo MiyataHerself | Herself |
 Miho WatanabeHerself | Herself |
 Hinano KamimuraHerself | Herself |
 Mikuni TakahashiHerself | Herself |
 Mari MorimotoHerself | Herself |
 Haruyo YamaguchiHerself | Herself |
 Yohei AzakamiNarrator (voice) | Narrator (voice) |