Goodbye, my beloved hero!

On her 15th birthday, Natalia recalls her memories from her past life. According to those memories, this world is a game world, and Natalia was cast as the losing heroine who would eventually become a sacrifice to the final boss and die. Wait, losing in love and having to die on top of that? No way! Natalia desperately tries to train herself and keep her distance from Lizul, the hero, but... "Why is the hero coming over here instead of leaving the heroine alone?!" "And I never agreed to hear that my master who trained me was actually the final boss!" "Huh, if I become his wife, maybe he won't have to destroy the world? Why didn't you say that sooner... Wait, why is the hero falling into darkness?!?!" ※This is a love triangle story between a tomboyish second princess, the final boss, and the hero. ※Also published on other sites.