Yurika has made the bold decision to attack Darkness Rainbow's base in order to try and prevent all-out war in Folsaria. It's going to mean a bit of a field trip for everyone, and a very big battle. Koutarou and the girls will have to consolidate all of the power they have—and maybe borrow some help from a few new(?) allies—to get home safely this time. There's a strange enemy on the horizon, but perhaps the only thing harder than fighting yourself is fighting someone you love...