(This book is also known as The Troubles of Sasuke in Date A Live.)
A transmigrator who has lost some of his memories merges them with Sasuke's, just as Sasuke is planning to reform the ninja world. But then, by accident, they end up in the world of Date A Live.
Tohka gets jealous and goes on a rampage again, Yoshinon gets knocked off again, Origami wants to get frisky again (?), and Miku wants to seduce him again (?).
"Why do I feel like I've been cheated by Mosaic? Sigh..." In this world that's just a tiny bit like the ninja world, Sasuke sighed and spoke in a helpless tone.
(A slice-of-life story, one heroine, no harem. Don't read if that's not your thing!)
