He has been watching his beloved daughter grow up. However, as she has grown up, she has recently stopped taking baths with him. He takes her on a trip to a hot spring just for the two of them, saying "this will be the last time." Finally, the father puts his plan into action to make his daughter his own without any interruptions. The daughter sleeps in a defenseless position, trusting her father. Her soft skin and her still-growing, innocent body transforms the father into a male!