Special episode bundled with the fifth Blu-ray and DVD volume.

Today, the world is in turmoil due to an "unprecedented catastrophe." Suzushirou, a young man who lives as a newspaper scholarship student in Tokyo, had a secret that no one could tell. An incident that happened in the summer of my third year of high school made it possible for me to stop the time around me regardless of my will. One day, Suzushiro meets a person who can share the secret for the first time. Like myself, Nazuna is a girl who has been hurt in her heart and has been able to stop her time. Suzushiro finds out that she is being used for crimes by her brother Seri, and reaches out impulsively. "Let's run away with me!" Can they move the time they have stopped again?

Unaired episode included in the fourth Blu-ray volume. The episode will take place during the same time in episode 16 (episode 5 in second cours) and depict what Eris and Ruijerd were up to outside the main story, as teased by the comment "Goblin Extermination."

The OVA will tell the childhood stories of the main characters, adapting from the first volume of Satoru Yamaguchi's original light novel. Bundled with the seventh limited edition volume of the manga.