is a Japanese light novel series written by Tanba and illustrated by Yuunagi. It was serialized online from February 2019 to February 2024 on the user-generated novel publishing website Shà Âsetsuka ni Narà Â. It was later acquired by Kadokawa Shoten, who have published sixteen volumes since September 2019 under their Kadokawa Sneaker Bunko imprint. A manga adaptation with art by Yukino Amagai has been serialized online via Kadokawa Shoten's Young Ace Up website since December 2019 and has been collected in nine volumes. Both the light novel and manga have been licensed in North America by Kadokawa. An anime television series adaptation produced by Maho Film is set to premiere in July 2026.
In the Ardrasia Empire, after the death of the crown prince in battle, the struggle for the throne among the princes has become heated. Since losing the struggle for the throne could even cost one's life, the lower-ranking princes are constantly at risk of assassination. The seventh prince of the Ardrasia Empire, Arnold Lakes Adler, continued to be incompetent and he is mocked by the nobles as the "leftover prince" because his twin brother, the eighth prince Leonard, had stolen all of his good qualities. However, Arnold is actually the strongest prince, and his secret identity is "Silver", a skilled SS-rank adventurer who hides his face behind a mask and completes difficult requests using powerful magic. Arnold has no intention of becoming emperor, so in order to protect his own life, he secretly works behind the scenes to support his younger brother Leo, whom he believes is more worthy of the throne.
Written by Tanba, The Insipid Prince's Furtive Grab for The Throne began serialization as a web novel published on the user-generated novel publishing website Shà Âsetsuka ni Narà  on February 3, 2019, and ended on February 4, 2024. It was later acquired by Kadokawa Shoten who began to publish it as a light novel with illustrations by Yuunagi under their Kadokawa Sneaker Bunko imprint since September 1, 2019. Sixteen volumes have been released as of April 2026. The light novel is published digitally in English on Kadokawa's BookWalker website.
A manga adaptation illustrated by Yukino Amagai began serialization on Kadokawa Shoten's Young Ace Up manga website on December 25, 2019. Nine volumes have been released as of November 2025. The manga adaptation is also published digitally in English on Kadokawa's BookWalker website.
An anime adaptation was announced during Kadokawa's "Sneaker Bunko 35th Anniversary Festa!" livestream on September 24, 2023. It was later confirmed to be a television series that will be produced by Maho Film and directed by Yà «ji Yanase, with Kazuyuki Fudeyasu handling series composition and Kazuko Tadano designing the characters. It is set to premiere in July 2026.
By September 2023, the series has over 1 million copies in circulation.