Hyouka Episode 21: The Case of the Homemade Chocolates
Episode 21 of 22 of Hyouka, aired September 9, 2012, 27 minutes. Available with English subtitles and dub where released.
Episode summary
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.