[Futamaro] Hatsujou Bishoujo no Midara na Mitsutsubo Ch. 1-5 [Kuraudo]

A flustered older brother can't stop stealing glances at his little sister Tsubasa during the family's trips to the public bath, and once she catches him staring, she turns his guilt into leverage—demanding hands-on 'inspections' neither of them knows how to stop. Between a broken laptop held hostage and a budding body she insists he judge for himself, Tsubasa pushes her personal tutor 'sensei' past every excuse he offers, even as hints of what mama did earlier linger over the household. Futamaro renders each blushing standoff and trembling first time with glossy, intimate detail, building from bathhouse glances to the defloration the little minx demands he finally put inside her.