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Every year, Yuka comes to help out as a caretaker at the study camp her husband, a teacher, holds for his students during the summer vacation. The study session begins with the lively students, but Yuka is concerned about one student, Manabu, who seems depressed. Her husband tells her that Manabu is lonely and has a personality that makes it difficult for him to say what he wants to say because he reads other people's expressions. Yuka also feels lonely because of her indifferent husband. That night, Yuka sneaks into the room where the students are sleeping quietly and clings to Manabu's back...