I (Tiana) have been reincarnated as the villainess in a "Death Game" where six people compete to achieve their respective victory conditions. My victory condition is [the death of all players except myself], a condition utterly irreconcilable with those of the other participants.

"To survive, I have no choice but to kill all the characters."

I resolve to do so. Fortunately, this is the world of a game I played in my previous life. I can use my past life's knowledge to my advantage, and furthermore, having reigned as the final boss in the game, I boast overwhelming combat power.

Despite having firmed up my resolve—

"Tiana-chan! Thank you for saving me!"

By a strange coincidence, I end up saving the heroine who was about to be killed. The heroine completely trusts me and aggressively tries to close the distance between us.

(I'll make the most of her. I can kill such an airheaded woman anytime.)

Based on that judgment, I begin acting together with the heroine. As we spend time together, contrary to my resolve to "kill all the characters," I find myself realizing my own feelings of cherishing the heroine.

To survive myself, I must also kill the heroine. Grappling with this dilemma, I eventually arrive at a single answer.