It's basically already the manga
You can get to the main page through the drop down menu
maou desu. onna yuusha no hahaoya to saikon shita no de, onna yuusha ga giri no musume ni narimashita. it says on the link that u posted.
No I mean what manga did this image come from? The scanlators used it for their credits but didn’t say where they got it from
Oh I am sorry I haven't thought it through
Hopefully you can still find it :)
What manga is this from?
http://www.mangago.zone/read-manga/maou_desu_onna_yuusha_no_hahaoya_to_saikon_shita_no_de_onna_yuusha_ga_giri_no_musume_ni_narimashita/hs/nhs_chapter-825883/pg-18/