The Ex-Arm manga (the birthplace of that bad Crunchyroll anime) has been suddenly cancelled mid-arc, with some guesses being that the anime tanked the manga's reputation : r/TwoBestFriendsPlay
EX-ARM manga Archives | CFTV
Read Ex-Arm Vol.2 Chapter 10: Backstabbing Father - Manganelo
Read EX-ARM Manga English [New Chapters] Online Free - MangaClash