The opening comes from The Super Ball with the song “Tomodachi Meter” and the ending sequence by Tomoaki Maeno and Yuki Kaji with “Tobira no Muko.”
The manga has been getting a simulpub from Crunchyroll since last summer as The Morose Mononokean.
In support of streaming The Morose Mononokean Sequel that’s now out as part of the winter 2019 season, Crunchyroll has started streaming the opening and closing sequences to the first season of The Morose Mononokean.
The opening theme song comes from The Super Ball with “Tomodachi Meter” while Tomoaki Maeno and Yuuki Kaji will be performing the ending theme song for it with “Tobira no Muko” in-character.