Puniru is a Kawaii Slime

Kotarou Kawaii, a second-year middle school student, has been friends with a slime named Puniru since elementary school. Initially created by Kotarou, Puniru came to life and has been by his side ever since. Over seven years, both Kotarou and Puniru have undergone significant changes, with Puniru evolving into a beautiful girl. Puniru's ability to transform into various cute slime forms adds to the complexity of their relationship as Kotarou navigates his feelings about their changing circumstances.