Mei, wanting Haruhi to face up to her feelings, leaves out a magazine that has a checklist for determining whether a girl is in love. As Haruhi reads through the checklist, she realizes that one host may have captured her heart without her even knowing.

Originally published in 2008 by Hakusensha, Inc. in Tokyo. In keeping with the original Japanese format, this book reads from back to front and from right to left.