Smartphone game Toaru Majutsu no Index Mokuroku Gensou Shuusoku is collaborating with the Overlord series, allowing characters from the anime to be collectible as well as sharing their outfits.

A fully-voiced scenario with a unique story only available to this game will come in the form of “Toaru Igyou no Zettai Kyousha”, and there will be various gacha as well.

Login bonuses will be present, as players will be given 145 Awakening Crystals for 3-star assist character “[Pleiades] Narberal Gamma”:

There will also be rewards and bonuses for clearing events and missions, and players can acquire characters such as Ainz Ooal Gown, Frenda in Shalltear’s outfit, Mugino in Albedo’s outfit, and Mare Bello Fiore:

The event is active now and will persist until November 17th.