Development System: Doomsday Killer

[This article has multiple endings, please refer to the announcement area for details] She is a killer like a robot. Killing is just a kind of fun for her, and swinging a knife mechanically and numbly is just a way to have fun. When she opened her eyes again, what she saw was an ugly head covered in blood. The world she was in was also contrary to her original world. Without the common sense she should have, she could only explore everything by herself. But it doesn't matter, she has something called a system, and all she has to do is complete the task, switching from killing people to killing zombies. But if there are people who don't have eyesight, she won't object to killing people at all. But... Besides killing monsters, you also have to fall in love? System! Have you smoked... ----- When a ruthless, cold-blooded, emotionless killer attacks outstanding men one after another, and is irrigated by tenderness, will that frozen heart gradually be melted by warmth? And who will you choose in the end? The prince smiled brightly and gently, "I like you." Leng Yan nodded, "Oh." After waiting for a long time, there was no answer, and the smile slowly stiffened, "What about you?" Leng Yan said seriously, "I like me too." --- Han Feng said with a cold face, "When will you like me?" Leng Yan felt confused, "Why should I like you?" "Because I like you!" "Oh." Han Feng had a dark look on his face. --- Chu Ye held Leng Yan's waist and ate tofu openly, "If you don't give me an answer, I will lock you up." Leng Yan looked unconcerned and said, "Your locks are so bad, I just pinched them and they broke." "Then I beg you to lock me up." "Are you nervous?" Leng Yan frowned. "Dip - the host has discovered the facts and obtained the item 'Holmes' Hat', please keep up the good work." --- Various characters will appear one after another, but who is the most important... (The author smirks: Hey, is it really okay for me to put the label aesthetic on the article?)