Wow...this dude is super full of himself to say the least.
We all know that our girl Yoshino has eyes only for her husband and will never look at another in that way. She loves her husband way too much...her interaction with the guy when he brought her husband home and then after not even remembering what his face looked like just cements that. Hopefully this dude doesn't show up that often.
Also, I can't wait until Yoshino reveals to our MC why she loves him and their connection from long before she joined the company to be with him. Hopefully when she tells him everything he will gain a lot more confidence in himself and their marriage to know that she only has eyes for him and loves him more than he knows...oh that will be so sweet I bet.