I knew it was gonna be like this so I was excited and sad. I'm just glad he finally got to celebrate with people who value him.
I wonder if grandpa will ever reveal that iruma was abused by his parents to Clara or azmo, or any of the other kids. I think with all the hints he's given so far they must know on some level that he's lived a really really hard life.
I don't know what Alice is planning next time we see him but, hopefully iruma can withstand it in one piece :'c