In the near future, the federal government creates a committee to rid society of books it deems unsuitable. The libraries vow to protect their collections, and with the help of local governments, form a military group to defend themselves--the Library Forces!

It's Valentine's Day, and Iku's hopes are dashed when Dojo, the guy she's been crushing on--and who's her Library Force superior!--receives an elegant box of chocolates from another woman. Romantic intrigue strikes the whole team as Shibazaki meets a would-be suitor and confides in Iku about her tortured love life. And it seems that Hikaru is being followed by someone from his past...