Btooom! is a Japanese manga series written and illustrated by Junya Inoue. It was serialized in Shinchosha's seinen manga magazine Comic Bunch, where it ran from 2009 until 2018, with its chapters collected into 26 tankōbon volumes. Btooom! follows the adventures of Ryōta Sakamoto, an unemployed and isolated young man who is one of the world's top players in the titular video game. After Ryōta is nominated to participate in the real-life version of the game, he becomes trapped inside it and meets his love interest Himiko, who was his in-game wife. With the help of their fellow players, Ryōta and Himiko must find a way to return home.

Comic Bunch is a Japanese manga anthology marketed to a seinen audience that was edited by Coamix and published weekly by Shinchosha from 2001 throughout 2010 and became monthly since 2011. The collected editions of their titles are published under the Bunch Comics imprint.