The 3 lucky uncles in the movie are lucky to have nieces who are not only talented and beautiful but also understand their psychology very well - the psychology of men without wives and children. Going to his brother's house to visit, as soon as he opened the door, his eyes were met by a beautiful girl dressed in a sexy outfit. As we talked, he realized that his niece, who was always asking for her uncle to carry her, had now become a young woman standing up. in front of me. However, even though she has grown up, her niece's old personality hasn't changed much, she still whines about wanting to sit on her uncle's lap and jumps around like she's riding a horse. As for a little change in personality, the older she gets, the more mature she becomes, which means her thinking about physiological and sexual needs also begins to develop. This has caused the act of "jumping around on the lap" to no longer be described as innocent as before, but instead it is a stimulating scene, imagining having sex with the uncle of this lecherous student. . This also made him extremely uncomfortable, unable to control himself when his nephew did so, leading to a secret incestuous affair that took place right before the reunion dinner.