I was thinking how'd these dumb students actually entered such a prestigious elite school. Then the end shows us they're really not that dumb, if the MC who purposely fixes his grades ends up second to the last.
Still, if the MC got in the school by having 50 in literally all of his entrance exams, there must be some other criteria. I wonder if they'll reveal what made these Class D people to be accepted into the school.
And wow, the heroine is a brocon. In the absence of osananajimi, I just can't help but ship her with her brother. Wasn't the seitou kaichou just going to caress the heroine's face before he got cockblocked by the MC? Silly MC, misunderstanding the situation...