[Taiyaki Pan] Monthly Girl {2d-market.com} [Decensored]

A boy who transforms into a busty, curvy girl for one week every month does his best to hide the truth behind a tightly wrapped chest and borrowed clothes—until a curious classmate tugs his shirt aside, spots the sarashi, and starts asking all the wrong questions. Her playful teasing turns into something far more intimate when she discovers exactly what he is still packing, and his panicked protests of being a guy dissolve into heart-eyed, trembling surrender as she rides him bare and urges him to keep going anyway. What begins as a secret on the verge of exposure becomes a breathless monthly ritual neither of them wants to end.