Raku Ichijo leads a typical life as a high school student, but he carries the weight of being the only heir to the Shuei-gumi Yakuza family. A decade earlier, he made a secret vow with a girl he encountered, pledging that they would "marry when they meet again." Since that day, Raku has cherished the pendant she entrusted to him, holding onto their promise as a symbol of hope and connection.
