The day before Valentine's Day, Nagi tries to make chocolate for Hayate and skips school. At Hakuou, getting permission from Hinagiku, Ayumu tries to give Hayate "love chocolate" to show her feelings but instead gives him obligation chocolate. Hinagiku notice Ayumu panicked and tells Hayate to exchange it. However, after receiving the "love chocolate", Hayate is a bit confused on the love concept and asks Maria for help...