akuma_river's manga / #fated pair(1)

The series is complete at 4 volumes. https://www.mangaupdates.com/series/ehnni30/erito-o-wa-yoru-ni-oborete Which is 20 chapters plus an afterword extra. So 2 chapters plus the extra are untranslated. FYI for Raws of the last chapters and extras you need to purchase it. Amazon has the published books in Japanese. Or you can purchase it here which has all her works. Google translate can get you to where you want to go. https://www.cmoa.jp/author/56841/ https://www.cmoa.jp/title/140854/