After Mizusawa Yume's mother becomes ill and passes away, she finds a picture of a man holding a baby in her mother's keepsake box. On the back of the picture it says "Loving Papa and Yume, at Raku no Yu." Yume has never known or even seen a picture of her father, but she believes that this guy must be him. Also in the box there is a lighter with the initials RM. After she finds that the "Raku no Yu", is a 'sento' (public bath) in Shibuya, Tokyo, she's off to meet her long lost father and to ge...