Tooru, the dragon maid, thinks that her novel love potion is the perfect way to take her affection for Kobayashi up a notch. With Valentine's Day approaching, she decides to include it in her homemade chocolates. Unfortunately, Kobayashi sees through her insincere gesture and ruins her scheme. However, the lively atmosphere and hot springs offer plenty of opportunities for Kobayashi and the dragons to revel in the festivities and enjoy the sweet celebrations.