Ojamajo Doremi: Heartwarming Theater is a 5-episode Flash animation spin-off series produced for the Ojamajo Doremi 20th Anniversary Thanks Festival crowdfunding campaign in 2020.

This series features an original character, Ayumi, who appears in each episode, who will share deep interactions with Doremi and her friends, leading to heartwarming moments that are a familiar theme in the Ojamajo Doremi series. The story is based off Ojamajo Doremi Story Picture Book: The Best Present.