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Aoi KATASE
Aoi KATASE is a high school student who is in the same class as Yamada. She is a very shy girl and is not very good at talking to people. She has a crush on Yamada, but she is too shy to talk to him. One day, she decides to write a love letter to Yamada. She writes the letter in her diary, but she accidentally leaves it on the school roof. Yamada finds the letter and reads it. He is surprised to find out that Aoi has a crush on him. He decides to talk to her and they start dating.