[squeezecandyheaven (Ichihaya)] Let's Make The Ideal Little Sister! [Komori Translations]

A brother's custom-built android little sister is his perfect companion—devoted, blushing, and cooing her love for her onii-chan, even as she scolds him about his messy room and teases that creating her was just an excuse to have sex with his little sister. Domestic bliss unfolds through squabbles that feel like genuine sibling bonding and sweaty cowgirl sessions where she rides him in her rumpled uniform, breathlessly calling him stupid with a heart on her lips. But when a news broadcast reports the disappearance of schoolgirl Terada Rina and an unexpected visitor comes knocking for Nakada-san, the girl's startled expression suggests this ideal little sister may be concealing something far darker.