Little Sisters, Etc.
Elder siblings gather to discuss an obvious truth: there is nothing wrong with being absolutely obsessed with their respective little sisters. But the discussion naturally transitions to whose little sister is cutest, resulting in rising tensions...
Aired 17/11/2021EP 6 - Little Sisters, Etc.

2021
KAGINADO
Laughs and shenanigans are on the horizon in this crossover! Fan-favorite characters from Kanon, Air, Clannad, Little Busters!, Rewrite, and more start the school year together in a new world where anything is possible. With so much personality in one anime universe, every day feels like a new kind of dream.
(Source: Funimation)