Responses
I wonder why they didn't list them all together?, Is it because it's Anthology?
https://www.mangago.zone/read-manga/the_most_heretical_last_boss_queen_who_will_become_the_source_of_tragedy_will_devote_herself_for_the_sake_of_the_people_comic_anthology/
https://www.mangago.zone/read-manga/the_most_heretical_last_boss_queen_who_will_become_the_source_of_tragedy_will_devote_herself_for_the_sake_of_the_people_the_savior_s_pride/
So there's a sequel of this one.
Related Series:
Higeki no Genkyou to Naru Saikyou Gedou Last Boss Joou wa Tami no Tame ni Tsukushimasu. (Novel) (Adapted From)
Higeki no Genkyou to Naru Saikyou Gedou Last Boss Joou wa Tami no Tame ni Tsukushimasu. To the Savior (Prequel)