>>279867494
Furinkan notes that: "Refuto and Raito are eating "tsukumi dango" (月見団子), "moon-viewing mochi". These are made from rice flour, rice and water and are traditionally eaten during the Moon Viewing Festival in September. The joke here is connected with the above rabbit/moon aspects of Japanese culture."

Look at their cute little cups. The rabbit you can vaguely see in the spots on the moon looks like it is making mochi.