Fussel (2019)

Fussel, the friendly monster, finds the beginning of a red string. This sparks his interest and he heads out to find out what's at the end. On his journey he meets different looking monsters, of which everyone has its own theory about the end of the string. Curiously they join Fussel on his journey. Being different isn't a problem in this group and together they head out to face challenges on their way to becoming friends.