How to Watch Isekai Quartet in Order Isekai Quartet is an anime series that defies straightforward classification.
It's a crossover between four popular light novel and manga series – KonoSuba: God's Blessing on This Wonderful World!
, Re:Zero − Starting Life in Another World, In another world with my smartphone, and The Rising of the Shield Hero – combining characters from different dimensions into a quartet that must work together to escape a mysterious realm.