He looks like Jade from "Tensei Shitara dai Nana Ouji dattanode, Kimamani Majutsu o Kiwamemasu" or "I Was Reincarnated as the 7th Prince so I Can Take My Time Perfecting My Magical Ability".
Now that you mention it...
He looks like Jade from "Tensei Shitara dai Nana Ouji dattanode, Kimamani Majutsu o Kiwamemasu" or "I Was Reincarnated as the 7th Prince so I Can Take My Time Perfecting My Magical Ability".