Makina-San's A Love Bot?! vol 4 back

POWER BOTTOM?!High schooler Akutsu Eita is a robot otaku, but now his dysfunctional and malfunctioning robot harem is making his life hectic! There’s Makina (a sexbot who knows nothing of intercourse!) and her little robo-sister, Mimika, who have already moved in! The combat robot Alma makes four, but perhaps not for long after Makina sends her human friend Mamimi a video that seems to show Eita being...taken from behind? Even after the misunderstanding is cleared up, the whole situation is a pain in Eita’s butt! Is there anything worse than a lovebot with a screw loose?!