[Yanachi] Chigyuu InCha ga Imouto ni Tsurerare Shuugaku Ryokou JK Shikainai Daiyokujou de Geneki JK to Gomunashi 18P Harem Dairankou!! | A Loser Introvert Gets Dragged by His Little Sister to a School Trip Bathhouse With Nothing but High School Girls and Ends up in a Bareback 18-Girl Harem Orgy!! [Chalklog]

A socially awkward introvert is reluctantly taken by his little sister to a nighttime school‑trip bathhouse, where the steamy atmosphere quickly turns charged. He finds himself surrounded by a gaggle of high‑school girls, their bodies pressed against his as they indulge in a wild, bareback harem orgy that pushes his limits. The tension spikes with each intimate encounter, culminating in an unexpected climax that leaves the trio tangled in desire.