The Villain Saves Himself and Makes the Mistake of Raising a Sickly Valkyrie

[System flow] + [Book-traveling villain] + [The development of a yandere] + [The ultimate cool article] Shen Jin transforms into a vicious cannon fodder that must die in the book, and is bound to the "villain's self-rescue system". As long as you invest in and redeem Jiang Wanyin, the most miserable heroine in the original work, you will receive generous rewards and change your life against the odds! Spending resources, cleaning bones, giving artifacts... In order to survive, Shen Jin forcibly fed a useless little white flower into a full-level Valkyrie. Seeing that her favorability level was full and the death crisis was over, Shen Jin was ready to run away in style, pushing her to the destiny of the male protagonist to follow the plot. As a result, as soon as they left the city gate, they were blocked by nine giant frost dragons. The Valkyrie, who had returned to full level, had red eyes and pointed her sword at the sky: "Master, you have accepted my heart, where do you want to go now?" Seeing the system's fatal danger warning flashing wildly, Chen Jin felt numb: The system didn't say that the rewards included yandere!