Isekai Quartet

Isekai Quartet (異世界かるてっと, Isekai Karutetto) is a Japanese anime series that serves as a chibi-style crossover between the light novel series KonoSuba, Overlord, Re:Zero − Starting Life in Another World, and The Saga of Tanya the Evil, all published by Kadokawa Corporation.

The series aired its first season in 2019 and a second season was confirmed to air in 2020, including characters from other series such as The Rising of the Shield Hero.