[P.A. Project (Teruki Kuma)] Ichiban Sentou ~Yonbanme~ [biribiri]

Set in a steaming men's bath, underage girls Aisha-chan and Keiko submit to intimate acts with their older brother Onii-chan, their bodies glistening as they explore oral and penetrative play that ends in nakadashi and double penetration. The mood shifts from innocent curiosity—"All the girls are fine with being in the men's bath, so this is pretty nice and refreshing"—to intense pleasure as they gasp, moan, and revel in each other's stacked, wet forms. With teasing lines like "I guess nobody's ever licked your chin and so on," the story teases a forbidden lolicon fantasy that blends the warmth of a communal bath with explicit sexual tension.