This is a harem that actually respects you enough to make the guy likeable instead of a punching bag, and it moves fast enough that you're never waiting around for the plot to remember it exists. The smartphone is window dressing, what matters is watching Touya juggle four simultaneous engagements without being a creep about it, which turns out to be rarer than it should be. If you want pure escapism with zero narrative weight and a protagonist who treats his fiancées like actual people, this is your show.

Touya's leisurely existence in a fantasy world continues as he balances romance with four fiancées while casually taking on whatever quests catch his interest. He still carries his reliable smartphone, and he is only starting to grasp the duties that come with being engaged to Yumina, Yae, and the twins Linse and Elze. Life feels manageable until the elder fairy Lean asks for his help: she wants to find the missing pieces of Babylon, a floating island built five thousand years ago by the mysterious Professor Regina Babylon. Touya reluctantly agrees and goes looking for the teleportation circles that lead to those islands. Meanwhile, strange monsters emerge that may be strong enough to destroy the world, and Touya has to turn ancient technology into weapons against them while keeping up with his many relationships.