Dungeon's Childhood Friends (ダンジョンの幼なじみ, Danjon no Osananajimi) is a Japanese manga series written and illustrated by Yasuhisa Kuma. It was originally published as a webcomic on the Nico Nico Seiga website in September 2021. It later began serialization in Media Factory's seinen manga magazine Monthly Comic Alive in January 2022.

Van is a young man who regularly fights his way through the Wyrm Hole dungeon to meet up with its boss, a dragon named Ryuka who is actually his childhood friend. Ryuka can transform into a more humanoid form, in which she and Van hang out for his monthly visits. Although most of the subordinate monsters of the dungeon see Van as just an uncommonly skilled warrior, Ryuka's four highest-ranking lieutenants—a harpy, a minotaur, an orc and a wolfman—are aware of Van and Ryuka's long friendship and are eager to help it become something more romantic.

Written and illustrated by Yasuhisa Kuma, Dungeon Friends Forever was initially published as a webcomic on the Nico Nico Seiga website on September 3, 2021. It was later acquired by Media Factory who began serializing it in its seinen manga magazine Monthly Comic Alive on January 27, 2022. Its chapters have been compiled into seven tankōbon volumes as of November 2025. The series is licensed in English by Seven Seas Entertainment.

In commemoration of the release of the first volume, a voice comic adaptation was uploaded to the Kadokawa YouTube channel on the same day. The voice comic featured the voices of Ayane Sakura and Yoshitsugu Matsuoka.

The series was nominated for the eighth Next Manga Awards in 2022 in the web category. The series was also nominated for the tenth edition in 2024 in the print category.