Why are we being introduced to some random childhood friend guy at this late point in the story ?? With an obviously, perfunctory ''you shold totally marry him in order to save the school Mei '' subplot to boot ? AGAIN ? Haven't we been through this already ? I swear to god, Saburouta will do anything but write about Yuzu and Mei at this point (^^) This is getting dangerously close to fanfic level writing.
Not that I don't agree that this addition came way out of the left field, but no, he made it pretty clear with the discussion with his father that we are not going in that direction this time.
Since it seems like it's just an excuse to get Yuzu jealous,
I could swear it was Yuzu who cluelessly got his number. If at all, it's Mei's turn to be jealous now for once.