[Anime] Kakegurui (Compulsive Gambler)

I've been keeping up with it. I gotta say, I can't tell what the purpose of the MC is. Is he telling the story from his perspective about someone else? I mean in every episode he barely speaks and whenever he does he acts like an incomprihensible idiot. Why bother including this dude as the MC when the entire anime is focused on Yumeko instead? Even the MyAnimeList page has the supposed MC listed as the third main, behind Yumeko and the student council president.