"Earthbound Spirit Boy Hanako-kun") is a Japanese manga series written by Iro and illustrated by Aida, which results in their conjoined name 'AidaIro'.

Nene Yashiro, a girl who wishes for a boyfriend, and a first-year high-school student, summons the Seventh and most famous Wonder, "Hanako-san of the Toilet", the spirit of a girl who allegedly haunts the bathroom and can grant wishes for the right price.

Along the way, Nene learns about her connection to the spirit world and the dark secrets regarding Hanako and his past.

Toilet-Bound Hanako-kun is written by Iro and illustrated by Aida, resulting in their conjoined names 'AidaIro' .

The series started in the July 2014 issue of Square Enix's Monthly GFantasy, published on June 18, 2014.

[20] A spin-off manga series titled Hōkago Shōnen Hanako-kun launched online on February 22, 2018.

[22] An anime television series adaptation was announced in the April issue of Monthly GFantasy magazine on March 18, 2019.

[31][32] In August 2023, a short anime television series adaptation of After-School Hanako-kun was announced, and is labeled as the "first installment" of the project.

It is produced by Lerche and directed by Masaki Kitamura, with scripts written by Kazuma Nagatomo, character designs handled by Aya Higami, who also served as chief animation director, and music composed by Hiroshi Takaki.

[b] Akari Kitō, Yu-ri Yoshida, Chitose Morinaga, and Mai Kanazawa performed the ending theme song "Koi!

[46] In a review of the anime series for NEO, Jones Alex praised the series and characters for being engaging, as well as the unique visuals, comparing Hanako-kun to a comic book brought to life, utilizing thick outlines, vibrant colors and distinct character proportions.

[47] In 2024, the series' first box set published by Yen Press was nominated for the Eisner Awards in the "Best Publication Design" category.