Two uncles who met on an online teenage girl video forum. They had been secretly filming the innocent growth of their nieces and posting the videos on social media. Through sharing these videos, they found common ground and eventually decided to meet in person. As the nieces grow older and move on to new schools, the men's desires intensify, leading to a new kind of relationship. During the cherry blossom season, the nieces also experience new sensations, gradually awakening to their own sexuality.