This reminds me of the chapter of Suzumiya Haruhi-chan (in Volume 4) where Achakura finds that she returns to normal Asakura size if she drinks alcohol, but she will get drunk even with the minimal alcohol in amazake.
It'll be my first time drinking amazake ♪Aah... it seems I've gotten a bit drunk...Good day, Darjeeling-san!It's thanks for all of the black tea that you give us de arimasu!Today is the Peach Festival, so I brought some amazake!A sweet low-alcohol or nonalcoholic drink.Oh my!
Thank you, Nishi-san.