Do Not Say Mystery

• Ja Kanji — ミステリと言う勿れ • Ja Romaji — Misuteri to Iu Nakare • Genre — Mystery

• Type — manga • Author — Yumi Tamura • Publisher — Shogakukan • Imprint — Flowers Comics α • Magazine — Monthly Flowers • First — November 28, 2017 • Volumes — 16

• Type — drama • Director — * Hiroaki Matsuyama • Writer — Tomoko Aizawa • Music — Ken Arai • Licensee — Viki • Network — Fuji TV • First — January 10, 2022 • Last — March 28, 2022 • Episodes — 12

• Type — live tv film • Director — Hiroaki Matsuyama • Writer — Tomoko Aizawa • Music — Ken Arai • Network — Fuji TV

• Portal — yes Don't Call It Mystery, also known as Do Not Say Mystery, is a Japanese manga series written and illustrated by Yumi Tamura. It has been serialized in Shogakukan's josei manga magazine Monthly Flowers since November 2017. A television drama adaptation was broadcast on Fuji TV from January to March 2022. By February 2026, the manga had over 22 million copies in circulation. In 2022, Don't Call It Mystery won the 67th Shogakukan Manga Award for the general category.

One day in winter, university student Totonō Kunō was accompanied to the police station to be investigated by detectives from the Ohinari Police Station, who visited his apartment in connection with the murder of Sagae, a fellow student and high school alumnus. It is said that Sagae was seen arguing with someone who looked like Kuno around 10 o'clock last night. Kuno categorically denies committing the crime, and goes to question and investigate an Inspector called Yabu and his friends every day.

• Totonō Kunō • Masaki Suda • Shioji Kariatsumari • Nanoka Hara (film) • Yura Akamine • Ko Shibasaki (film) • Asaharu Rumazaka • Kouhei Matsushita (film) • Rikinosuke Kariatsumari • Keita Machida (film) • Neo Hahakabe • Riku Hagiwara (film)

Written and illustrated by Yumi Tamura, Don't Call It Mystery was first published as a one-shot in Shogakukan's josei manga magazine Monthly Flowers on November 28, 2016. It started as a serialized manga in the same magazine on November 28, 2017. Shogakukan has collected its chapters into individual tankōbon volumes. The first volume was published on January 10, 2018. As of February 10, 2026, 16 volumes have been released. At Anime Expo 2022, Seven Seas Entertainment announced that they licensed the series for English publication.

In June 2021, it was announced that the series would be adapted into a drama series, starring Masaki Suda as Totonō Kunō. It was broadcast on Fuji TV from January 10 to March 28, 2022. It was directed by Hiroaki Matsuyama, with scriptwriting handled by Tomoko Aizawa, and music composed by Ken Arai. King Gnu performs the series' theme song "Chameleon". The streaming service Viki added the series to its catalogue in May 2022.