[Misaki Tokinobu] Kanojo no Imouto w Nikushoku kei Gyaru [biribiri]

Shirai, a nervous, bespectacled boy, has invited his girlfriend Onee-chan to his house, only for the visit to be hijacked by Tarou, the dark-skinned, twin-tailed little sister with an insatiable carnivorous streak. Once she sets her sights on Shirai, the bewildered boy is pulled into a dizzying spiral of surprise intimacy, with Tarou's bold, teasing demands escalating the tension to its breaking point. The chaotic encounter finally finds an oddly domestic resolution in the kitchen, where all three find themselves sharing an after-hours moment that blurs every boundary.