2021 [[crossover]] anime involving characters from various [[Key (company)|]] titles, initially the visual novels. A second season was announced, to air in April 2022.

h4. Titles involved:

* [i][[Kanon]][/i]
* [i][[Air (visual novel)|]][/i]
* [i][[Little Busters!]][/i]
* [i][[Clannad]][/i] (including [i][[Tomoyo After]][/i])
* [i][[Planetarian]][/i]
* [i][[Rewrite]][/i]
* [i][[Angel Beats!]][/i]
kaginado