Karen is deeply in love with her childhood friend, Mii-kun, who has a rough and intimidating appearance. She makes consistent romantic gestures towards him with the hope of marrying him someday. However, when they are alone together, she can't help but feel nervous. Although Karen is confident and assertive in front of others, she becomes a bashful teenage girl in front of her crush. It's a romantic comedy that captures the essence of first love and will surely cause palpitations in your heart.