Keigen was born as the second son of three brothers. To his mother, Yukaka, he seemed like a child who didn't require much attention... But one spring, his older brother got a job and moved out, his younger brother enrolled in a boarding school, and his father went on a business trip alone. Their lives suddenly changed, and Keigen and Yukaka began living together as just the two of them. The once lively home became quiet, and Yukaka felt a sense of loss... Seeing his mother like this, Keigen felt bitterness and emptiness, trying to reclaim his mother's love that he had never been able to possess exclusively.
