[Hiiragi Popura] Little sister-fication Shampoo [Full Color] [ChoriScans]

A boy's ordinary shower takes a wild turn when a mysterious shampoo reshapes him into a cute, blushing girl with soft curves and sensitive new parts. Her big brother wastes no time claiming the results—sliding a hand between her freshly transformed thighs and kneading her growing breasts until they swell into full, groped handfuls. What starts as suspicion over his odd behavior melts into breathless surrender under the running water.