So I saw that some of these weren't translated for people to see and I wanted everyone to know Nishi-sensei's notes for Volumes.
This is as you can see 49th volume's afterword so take caution for spoilers
The story of Henri and Merize
This volume is entirely a flashback story. It's
the longest flashback arc in the entire "Welcome to Demon School! Iruma-kun" series so far, and it's the story with the most "romance" as its theme. It's exciting, isn't it? The name "Merize" comes from "Merize: the fruit of the European cherry tree," which essentially means "cherry." Cute. It's just a feeling, but the treatment of "humans" in the past demon world was more lenient compared to the present. This is partly because there were fewer precedents, but still...
The image is more of "unknown" than "danger," and there's little sense of urgency to take immediate action. It's a very relaxed human interaction. Normally, a superior would be more cautious and keep things in order, but... Many demons with strangely familiar names gathered for the "Ritual of the Demons' Arrival."(she means Ameri's birth I don't remember the exact translation for the term)
What happens after "love" will be revealed in the next volume. Unable to bear this serious atmosphere any longer, I've inserted a short story about the Iru-Army and Boku Alliance. Let's relax for a moment, and see you in the next volume