Bonyuu-chan wa Dashitai. – Episode 4 (EN)

Building on the taboo triangle from previous episodes, the focus shifts heavily to Suzuka, the cute little sister with inverted nipples, whose hyperactive sex drive refuses to subside after marathon three-day milk sex marathons with her brother/partner. Even on a crowded school bus, she succumbs to uncontrollable arousal, forcing secretive, risky encounters. Determined to "educate" and tame her, the protagonist aggressively stimulates her inverted nipples—sucking, pinching, and teasing until they protrude and become ultra-sensitive. This leads to animalistic, dominant sex where he ravages her "perverted weak pussy" with ferocious thrusts, delivering multiple deep creampies that overflow and drip. As the intense pounding continues, Suzuka's body transforms: her once-flat or modest breasts swell noticeably, filling with milk for the first time. She experiences her inaugural lactation, "shooting" out creamy jets during overwhelming orgasms, turning her into a true "little milk mama" in training. The episode explodes with incestuous sibling play, public risk on the bus, inverted-to-protruding nipple development, beast-mode fucking, repeated internal shots, and the thrilling debut of Suzuka's own breast milk production—delivering ultimate taboo lactation fetish fulfillment!