This scene is similar to the beginning scene in episode 5 of "Haiyore! Nyaruko-san W" and reuses several references.
Shantakkun serves Mahiro a plate full of carrots. Shantakkun's love of carrots is referencing Ryou Ouki from "Tenchi Muyou! Ryou Ouki" (天地無用!
Also, is it bad that when I saw the massive sundae they were working on, my head immediately went to this?
Open event for 'Haiyore! Nyaruko-san W' held. Asumi Kana, 'All of you who saw us today have been cast a curse to watch the show'