Wah! An Apocalypse Hitwoman Reborn as a Lovesick Valedictorian

[BL x system fantasy x silly comedy x both leads are each other’s only partners] His codename is K17. He’s a System task executor, sent to complete System missions in different worlds so he can stay alive. In his previous life, he was a killer in the apocalypse. He started killing zombies the moment he opened his eyes, and kept at it until he was twenty-one, when he was surrounded and bitten to death by thousands of them. His whole life, the world had only two colors: Black and red. Black was the night; red was blood. Cold and loneliness had sunk deep into his bones, chilling him until his very soul seemed to tremble. His one and only wish was to live a warm life, just once. To open his eyes and see warm sunlight, and close them while listening to the gentle voices of his family. The System repeatedly assured him that this mission would fulfill all his wishes. K17: I mean, I want tons and tons of money, and tons and tons of love. You’re sure I’ll get both? System: You will. All of it. K17 was doubtful. Could he trust this useless System this time?