Puniru wa Kawaii Slime 2nd Season

A young middle schooler named Kotarou faces challenges as he tries to manage his relationship with a shape-shifting slime girl named Puniru. After spending years together, Puniru disappears during a period of training aimed at making her more adorable. Kotarou is left to navigate his emotions and the unpredictable nature of her abilities. At a later point, he receives a mysterious and damp package, adding to the uncertainty of what has become of Puniru.