After relocating to the extraordinary Happiness House, Michi stumbles upon a peculiar nut-shaped item in her room. To her surprise, a quirky being named Nanami-chan emerges from it, sparking an instant friendship. Delving into a world of enchantment, Michi and Nanami-chan embark on a journey of discovery, encountering a host of quirky inhabitants within the whimsical tree abode.