Hanamori's complete inability to draw anything except Benzes. Demonstrated perfectly when Sugimoto asks him to draw the outside of Inari's house. The result is a poorly drawn, nigh-incomprehensible mess...except for the perfectly illustrated Benz parked out front.
Plus the fact of how easy it is to bribe Hanamori. He'll give away every single one of his best friend's secrets for cars.
Mayaya and Nomu catch Chieko sitting and sleeping against the wall one day. The girls decide to pretend Chieko is pregnant and in labor, and they act as nurses to deliver the "baby." The baby turns out to be Banba, wrapped up in blankets, whom Mayaya holds up with tears of joy.
Mayaya: Look, it's a healthy afro girl!
This page where the sweet shop owner summons his wife like a demon and she proceeds to assault Shuu with salt