shoujo sepia to mahou no hon
Sepia and the Magical Book (少女セピアと魔法の本) is a Japanese 2D platformer game by pixiv artist konoe, made in Unity for Windows.
Stars a young girl named Sepia, this game is about her adventure inside the fairy-tale-like world of a magical book. This game features a strong focus on transformation (particularly animalization) as a game mechanic.