A female college student named "May" becomes interested in "The Path of Boobs" after watching it on TV and starts attending a boob path class. Initially feeling confused and embarrassed, May gradually gets engrossed in its charm under the guidance of the master. Several months later, at May's suggestion, she decides to showcase her training results to her boyfriend Tatsuya. Impressively, May completes her "work." Subsequently, Tatsuya also begins to learn "The Path of Boobs," and the couple starts to advance together in "The Path of Boobs."