The protagonist is wronged or harassed (in this case, on a crowded train).

In recent years, "Revenge" (or Zamaa in Japanese slang) has become one of the most popular sub-genres in web literature. These stories follow a predictable but satisfying arc:

While the keyword itself is a bit of a "word salad" likely generated by search algorithms or specific tags, it points toward a very specific narrative trope: a character named Mizuki dealing with unwanted contact in a crowded space and eventually enacting a form of "payback."

The keyword reflects a growing interest in "Justice" or "Payback" narratives within niche fiction. Whether it’s a manga update or a web novel chapter, the appeal lies in seeing a vulnerable situation transformed into a moment of empowerment for the character.

A frequent, albeit controversial, setting in Japanese media used to establish a conflict involving unwanted advances in public transit.