A NEET guy who does nothing at home is constantly nagged by his stepsister, asking, "Why don't you help out around the house?" One day, he finally decides to run the washing machine, but ends up shrinking his stepsister's clothes beyond belief. When she discovers this, she confronts him with her huge breasts spilling out of the shrunken outfit. Seeing her like this instantly makes his dick hard. Surprised by his reaction, she suddenly changes her attitude and starts growing closer to him. Since they're not blood-related, maybe creampie won't be an issue after all.