Believe it or not, this fatass is supposed to be a ko. The parent begs oniisan to save it while the stuck yukkuri continuously hurls slurred abuse at him.
He tries pulling and pushing it, then takes the lid off and tries from the other side, but all it accomplishes is to move the anko inside Reimu around and almost kill it.
The mum begs him to stop so he does. But he has one last try at pushing from another direction, from its face. When he does though, the weakening yukkuri bites his hand, which still hurts even though the teeth are mostly sugar.
"Shiddy old man! How dhare yuu bully cyuute cyuue Reimu?!" 'Ah, I guess its time to smash it...' He thinks, but that would make all of his patience and effort up to now pointless. He wants to give the reimu a more fitting and interesting death.