The youngest of three brothers, Tatsuya was the second to be born. Yumi, his mother, thought he was an unassuming kid who didn’t make a lot of noise, but… My younger brother enrolled at a boarding school on the advise of a sports coach one spring while my elder brother found a job and moved out on his own. My father left the house, his life abruptly altered, and a mother and kid started cohabitating. Yumi has a sense of loss when the busy home abruptly goes silent. When Tatsuya sees his mother in that way, he is overcome with an unfathomable feeling of envy and seeks to win back his mother’s affection, which he had previously been unable to do.