Hanako-kun is rendered as a compact, chibi-style figure designed for display and use as a noodle stopper. The figure captures his distinctive silhouette with a rounded head, tiny limbs, and his signature scarf that appears to flutter in a light breeze. Painted in a restrained palette of deep black for hair, pale skin tones for the face, and a bright red accent at the scarf, the figure is finished with a glossy coat that helps it stand out on a ramen cup. The expression is friendly and curious, with large, expressive eyes and a small mouth. The noodle stopper base is integrated into the design, allowing it to function as both a display piece and a practical stopper. The overall sculpt reads playful and collectible, with clean lines, crisp paint, and a compact pose that fits easily on desks or kitchen counters.

Toilet-Bound Hanako-kun follows Nene Yashiro, a spirited high school student who discovers that the world is filled with spirits that hide in ordinary places. She encounters Hanako-kun, the cheerful and enigmatic ghost of a boy who haunts the school’s bathroom. Though bound by counter spells and supernatural rules, Hanako-kun becomes her ally in seeking the truth behind whispered legends and the rules that govern the afterlife. Together they navigate dangerous bargains, friendships, and the weight of memory as they confront mischievous spirits, powerful entities, and the mysteries of the boundary between living and dead. The series explores themes of trust, loss, and resilience as Nene learns to balance her own wishes with the greater good, while Hanako-kun evolves from a playful trickster into a reliable partner who respects the consequences of every wish. Set against a modern city setting with a haunting undercurrent, the story blends comedy, mystery and supernatural adventure, inviting readers to consider what it means to help others and what it costs to know the truth.