(C105) [obsession! (Hyoga.)] Nani ga Haeta Hajime | Hajime Grew a Dick! [Castle TL]

Hajime, a school-uniformed girl, undergoes a sudden futanari transformation marked by pronounced breast growth and a new, enlarged penis, turning a routine school exercise and the attention of her friends into an increasingly awkward awakening. The girls’ teasing and reassurance contrast with Hajime’s overwhelmed insistence that the new sensations feel almost crazy, while her own curiosity pushes the story toward private experimentation. The mood balances school-life comedy, bodily surprise, and escalating embarrassment as Hajime confronts a change that becomes more conspicuous with every page.