Miwako still carried in her heart the deep bond she once shared with her only family—her son Kaoru. For five years, Kaoru had cut off all contact after leaving their hometown to work in Tokyo. Burdened by struggles at work and consumed by self-doubt, the son who once cherished his mother's warmth and their time together had lost even the will to respond to her calls. Yet deep inside, Miwako never stopped longing to see him again. Finally, her wish came true—Kaoru was coming home. To celebrate his return, Miwako planned a hot spring trip. It would mark a reunion between mother and son, a journey signifying a fresh beginning, and an attempt to rebuild the profound connection they once shared.