Season 0 · 3 episodes
E1
Memories
Summary of Misuzu Kamio's story arc.
E2
Air in Summer - Mountain path
The events of the Summer arc are retold from the escape from the shrine to before the mountain. These events also include scenes not shown in the original Summer arc.
E3
Air in Summer - Universe
The relationship between Ryūya and Kanna is explored more showing their bond to be more romantic than platonic in nature.