Responses
Imo, it seems to be a spell. Before the younger brother licked Yurito’s eyes, Yurito was aware that he was low on Cori’s spirit energy. But after Hakujin(?) licked Yurito’s eyes - which was most likely the catalyst for casting the spell - Yurito acted like Coro didn’t exist. Further, Hakujin seems to be making Toshimaru sleep - as seen when he touched a very energetic Toshimaru, who was then suddenly drowsy.
In all likelihood Hakujin wanted to slowly remove Coro and Toshimaru from Yurito’s memory and steal him from Coro.
THANK YOU SO MUCH FOR YHE EXPLANATION
HOW DID HE FORGOT HIS OWN HUSBAND? PLEASE SOMEONE TELL ME ITS NOT JUST HIM BEING STUPID AND ITS A SPELL OR SOMETHING