Toudai is the original creator behind the Japanese light novel series and subsequent manga adaptation I Got Caught Up In a Hero Summons, but the Other World Was at Peace!. The series began as a web novel published by Toudai on the user-generated novel website Shōsetsuka ni Narō, where the first chapter was posted on May 7, 2016. This work is considered Toudai's debut as a writer. The web novel's success led to it winning the grand prize at the Morning Star Award, an accolade that resulted in the series being acquired for physical publication by the Japanese publisher Shinkigensha. In an interview following the award, Toudai explained that the initial concept for the story was different; the original plan was to write a fantasy narrative where the protagonist was ostracized for being useless until discovering a hidden power. Toudai ultimately chose to change direction, feeling uncertain about creating a compelling story along those lines, and instead wrote a narrative centered on a protagonist summoned to a peaceful world where he was welcomed by everyone.

The primary and most notable original work by Toudai is I Got Caught Up In a Hero Summons, but the Other World Was at Peace!. The light novel series, illustrated by Ochau, began print publication on June 22, 2017, and as of December 2023, had released fourteen volumes. The series was later adapted into a manga, with the story credited to Toudai and illustrations provided by artist Jirō Heian. The manga began serialization in Kadokawa Shoten's Comp Ace magazine on August 25, 2018, with the first compiled tankōbon volume released in Japan on April 26, 2019. The manga has been licensed for English release by Seven Seas Entertainment. The story follows Kaito Miyama, a university student who is accidentally transported to another world during a ceremonial hero summoning, only to discover that the world has been at peace for centuries, leading him to explore his new surroundings and form relationships with its inhabitants rather than embark on a traditional quest.

The artistic identity and recurring themes in Toudai's work can be identified through this series. A central theme is a subversion of typical isekai fantasy tropes; instead of a hero summoned to fight a great evil, the protagonist is brought to a world where the conflict has already been resolved, and the "hero" role is a ceremonial title. The narrative prioritizes slice-of-life elements, character interactions, and the development of relationships over combat and high-stakes adventure. Toudai has stated that the original intention was to write a story where the protagonist was welcomed by everyone, which is reflected in the narrative's focus on the main character being embraced by a cast of powerful and benevolent figures, including demon kings and gods.

In terms of industry significance, Toudai's work is an example of a successful transition from a web novel on a user-generated platform to a professionally published light novel series and a manga adaptation. The series' initial recognition came through winning the Morning Star Award, which served as a launching point for its print publication. The longevity of the series, with over 2,000 chapters published online and fourteen light novel volumes in print, indicates a sustained readership and commercial viability. The subsequent manga adaptation, serialized in a major magazine like Comp Ace and licensed for international release, further establishes the reach and impact of Toudai's creation within the broader anime and manga industry.