[b]KonoSuba: God's Blessing on This Wonderful World! Fantastic Days[/b] is a Japanese smartphone gaming app published by Sumzap for Android and iOS. Based on the [[kono_subarashii_sekai_ni_shukufuku_wo!|KonoSuba]] series, it was released in early 2020. Service for the game on personal computer was later commenced in early 2024.

It is a party-based battle RPG that features an original story, full voice acting, and SD character designs for regular characters such as [[Satou_Kazuma|Kazuma]], [[aqua (konosuba)|Aqua]], [[Darkness (konosuba)|Darkness]], [[Wiz (konosuba)|Wiz]], [[Megumin]], [[Yunyun (konosuba)|Yunyun]], and more.
konosuba fantastic days