Eru grows bored of the club's lack of activities, and suggests that they prepare an anthology to submit for the school's culture festival in the fall. While tracking down previous anthologies, the club discovers a mystery in the school's library.

During summer vacation, the Classic Lit Club members take a trip into the mountains to stay at a hot springs resort inn run by Mayaka's relatives. While there, Eru and Mayaka see what appears to be the ghost of a man who hanged himself!

Eru's curiosity is drawn by the rash of thefts from the various clubs, and when Hotaro discovers a pattern to the crimes, Satoshi comes up with a way to publicize the Classic Lit Club through the school newspaper so they can sell their anthologies.

While in middle school, Satoshi rejected Mayaka's Valentine chocolate, so this year, she works even harder to present him with a Valentine's Day masterpiece. But when it turns up missing, the search is on to discover what happened to it.