If those were actual inflorescences of Amorphophallus titanum and Rafflesia arnoldii, Seiya and Isuzu would be treated to the gentle aromas of dimethyl trisulfide, dimethyl disulfide, trimethylamine, isovaleric acid, benzyl alcohol, phenol, indole and other distinctively fragrant molecules.
It’s just possible that Amagi Brilliant Park is that rare thing, a KyoAni show worth watching.