I'm home, Mom. Kazuya returns home to his mother, Yuka, for the first time in a year. Yuka was excited to be reunited with her beloved son, whom she had raised with great care. A year ago, we were in love with each other every day. Yuka can't control her excitement as Kazuya becomes a member of society and grows up as a full-fledged man. They desperately seek each other to fill the gap of a year, but it's not enough. It seems like forever