The worst crime in this world is love.
The female protagonist takes revenge and seduces the loser male protagonist. Her gentleness and sweetness successfully make the flirtatious male protagonist devote himself to this love. Unexpectedly, he falls into the trap she carefully laid out, and every step of the way is startling and lingering. In the end she won, she won the whole world, but lost to him. Can she bid farewell to the old grudges in this life, and can she live the rest of the years warmly...
Concept: Gentle sister grows up for her sister