is a Japanese light novel series written by Kotatsu Takahashi and illustrated by Kakao Lanthanum. It began serialization on Kadokawa Corporation's Kakuyomu website in November 2021. It later began publication under ASCII Media Works' Dengeki no Shin Bungei imprint in December 2022. A manga adaptation illustrated by Kōji Yokoyama began serialization in ASCII Media Works' seinen manga magazine Dengeki Maoh in December 2023.

Synopsis The protagonist is reincarnated into the world of the video game Spirit Wars: Dungeon Magia. However, he is not the protagonist, nor a background character, but a boss who gets beaten in the tutorial. After he finds out that his older sister will die from an illness, he vows using his knowledge of the game to destroy every plot point that will result in his sister's death.

Media Light novel Written by Kotatsu Takahashi, Before the Tutorial Starts: A Few Things I Can Do to Keep the Bosses Alive began serialization on Kadokawa Corporation's Kakuyomu website on November 27, 2021. It later began publication under ASCII Media Works' Dengeki no Shin Bungei light novel imprint on December 16, 2022. Six volumes have been released as of March 17, 2026.

During their panel at Anime Expo 2024, Yen Press announced that they had licensed the series for English publication with the first volume being released in December 2024.

Manga A manga adaptation illustrated by Kōji Yokoyama began serialization in ASCII Media Works' seinen manga magazine Dengeki Maoh on December 26, 2023. The manga's chapters have been compiled into five volumes as of September 2026.

Reception The series won the Grand Prize in the Isekai category at the 7th Kakuyomu Web Novel Contest in 2022. The series was ranked eighth in the and novel category in the 2024 edition of Takarajimasha's Kono Light Novel ga Sugoi! guidebook. The series was ranked seventh in the category at the 2024 Next Light Novel Awards.

See also Combatants Will Be Dispatched!, another light novel series with the same illustrator The Healer Who Was Banished From His Party, Is, in Fact, the Strongest, another light novel series with the same illustrator

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