終末のワルキューレ [Record of Ragnarok]

終末のワルキューレ [Record of Ragnarok] is a 15-book series with 15 released primary works first released in 2018 with contributions by Shinya Umemura, Azychika, Takumi Fukui, 梅村真也, アジチカ, and フクイタクミ.