I think we should all prepare for more annoying mom/family tropes because it’s literally in the korean title! Mom’s Friend’s Son! I guess this is lost in translation since the eng title is love next door. So the competitive moms and the relationship between mom-daughter and mom-son must be one of the core themes that they’ll make a commentary on it.
I can see him as a haggard detective playing mind games with the villian while trolling his boss. lol.