To Yuno, Miyako, and Sae's surprise, Hiro receives a love letter from a 3rd grade classmate. After hearing the news, Hiro's friends can hardly concentrate on the class as they are very curious about the love letter. After school is over, the classmate who write the love letter confesses his love for Hiro on the rooftop. However, on the next day, she writes him a letter of refusal, to everyone's disappointment. However, Hiro's friends look up to her for her maturity.
