The official Twitter account for Nagabe's The Girl from the Other Side: Siúil, a Rún manga revealed on Friday that the manga will get a "longform anime" project. The anime will ship as an original anime DVD (OAD) bundled with a bonus volume of the manga that will ship on March 10, 2022.
(Source: Anime News Network)
Note: Originally released as a movie-length OVA. As streaming on Crunchyroll, it is split into 3 'normal' length episodes.