confirm that the two versions of the story should be treated as separate continuities. and its explanation for Mirai's return?

Since the light novel halted at Volume 3, Kyoto Animation created much of the latter half of the series and the sequel movie, I'll Be Here , as original content.

: The novels focus more heavily on the internal mechanics of the Cursed Clan's blood and the specific lineage of the Nase family.

The final volumes of the light novel series build up to a climactic confrontation between the main characters and the true enemy, Shizuku Hida. Shizuku's backstory and motivations are expertly woven throughout the series, making his eventual reveal as the primary antagonist both surprising and heartbreaking.

Throughout the series, Akihito and Mirai develop a close bond, navigating their relationships with other characters, including Kōshi Sugisawa, a troubled Spirit Energy user, and Shōka Hiiragi, a talented but reclusive Spirit Energy user. As the story unfolds, Akihito's past and his connection to the Spectral world are slowly revealed, leading to a dramatic confrontation with the series' main antagonist.

Beyond The Boundary Light Novel Ending =link=

confirm that the two versions of the story should be treated as separate continuities. and its explanation for Mirai's return?

Since the light novel halted at Volume 3, Kyoto Animation created much of the latter half of the series and the sequel movie, I'll Be Here , as original content.

: The novels focus more heavily on the internal mechanics of the Cursed Clan's blood and the specific lineage of the Nase family.

The final volumes of the light novel series build up to a climactic confrontation between the main characters and the true enemy, Shizuku Hida. Shizuku's backstory and motivations are expertly woven throughout the series, making his eventual reveal as the primary antagonist both surprising and heartbreaking.

Throughout the series, Akihito and Mirai develop a close bond, navigating their relationships with other characters, including Kōshi Sugisawa, a troubled Spirit Energy user, and Shōka Hiiragi, a talented but reclusive Spirit Energy user. As the story unfolds, Akihito's past and his connection to the Spectral world are slowly revealed, leading to a dramatic confrontation with the series' main antagonist.