I can't unlock challenge dungeon map when i passed map ulti phase 2 this event

Lavender Character Quest? Oh man, I dunno if the KC can survive the yandere

Speaking of which, her sex scene is actually rather disturbing to see. I think if that much blood is dripping down her leg, you need to get her to the hospital.

Oh lord! She tried tying me to a tree! Time to ship her off to Prison Island

Originally Posted by Tears

I can't unlock challenge dungeon map when i passed map ulti phase 2 this event

From the DMM wiki:

Due to a bug found during the maintenance for the 2nd half of the event, the 2nd challenge dungeon was not released. Instead, players were given the Premium Gacha Ticket for free as compensation.

Guess what we didn't get from Nutaku?