That was the crack in the dam.

The title has recently gained traction across various digital fiction communities and manga/manhwa discussion boards. This specific premise taps into several popular tropes: the "bully" dynamic, the protective or vulnerable "mother" figure, and the dramatic tension of a family unit being invaded by an outside antagonist.

A bully uses various methods—including blackmail—to manipulate and corrupt the protagonist's "innocent" mother, Yuna.