Sonshi's eye can come out to record sound and video for Tousei's viewing.
When Enhou is turned into a Horror, there are two rings on the table from the glass. The second ring didn't make sense before, not knowing that she was given two drinks, one of which knocked her out.
Apparently Tousei is the only one with a different mother because he's the product of rape. He refers to his mother as "that woman".
This episode has the second depiction of a Horror attacking during a birthday party. Kitajima Haruka had to return home for a birthday party in episode 10 when her teacher killed her family.
