[Higuma-ya (Nora Higuma)] Botsu ni Natta Oneshota Manga [FaPit scans]

In a quiet moment of domestic life, a young boy's curiosity leads him to explore the unexpected physical charms of his older sister, Aya-nee-chan. What begins as a simple, accidental touch turns into a series of curious gestures and sudden discoveries. As the boundaries between sibling affection and physical exploration blur, the tension builds between innocent curiosity and the overwhelming sensory reactions of a sister caught in a state of blissful surprise.