Karen and Miyu grew closer after entering high school and ending up in the same class. As they spend more time together, they find themselves increasingly drawn to one another, and little by little, the distance between them begins to close. They start noticing each other's little gestures and habits, and even feel jealous when they see the other getting along with someone else. At times, they even wonder whether the feelings they have for each other are wrong… But who cares what other people think?! Wanting to take their relationship one step further, the two finally gather the courage to confess their feelings to each other. …And this is the story of the knights who, working behind the scenes, fight with everything they've got to protect the precious relationship between these two girls!