Twenty years ago, when Rena's husband went missing, she worked tirelessly to raise her son Tatsuya, who was then a student. She sent him to university and helped him secure a job, raising him into an upstanding member of society. In return for his daily gratitude, Tatsuya presented Rena with a trip to a hot spring resort. While Rena joyfully accepted the gift, Tatsuya had made up his mind about something. He decided to confess that he liked her as a woman…
