He fell in love
It's actually kinda cute
He also acted very tsundere about it
Shadow/Regular Izuru: I-It's not like I liked you or anything or enjoyed your company... baka!
PToH Chiaki: >w<
Izuru: Her name is Nanamini and yes she's alive...'
Nanamini: HELLO!
Hajime: Holy shit dude... HOW???
Izuru: Demon from Hell remember? Also, it's made of a volunteering spirit from the heavens ever since I've been redeemed... something about being another universe's Chiaki or something?
Chiaki: GOD ALLOWED IT? AND ANOTHER ME?
Izuru: Yeah! Also the shrine STAYS during the wedding... that is non-negotiable...
Phantom Thieves of Hope Izuru Kamukura, Ultimate Chiaki Simp
Izuru: Yeah! Just kiss already!
Hajime: YOU TOO???
Izuru: I mean yeah... I already confessed my love, now it's yours! AND STOP FORGETTING ME!
Also, a neat HinaNami video I found: Twitter/X Video Link.
[TRANSLATION]
The text left of Hajime: "5 seconds before they kiss for real."
Hajime: "Are you really sure?"
Chiaki: "Yes."
Meddlers: *Murmuring*
Hajime: "HEY**💢**"