The Young Man and the Sea
After learning of Nozomi's death from Kossetsu's letter, Nagara and Mizuho perform a ceremony in her honor. As they advance on the project to return home, they are visited by an old friend, who tells them the story of when he met the man who invented death.
Aired 24/09/2021EP 11 - The Young Man and the Sea

Sonny Boy
It’s an ordinary summer vacation...except for the fact that Nagara’s high school has mysteriously drifted into another dimension. As the students begin to develop strange new powers, will they work together to survive the alien environment and find a way home, or will their newly formed factions and rivalries turn on each other?
(Source: Funimation)
Note: The first episode received an advance release on YouTube on June 19, 2021. The regular TV broadcast started on July 16, 2021.