Two male leads, both virgins, with a self-love element. A cultivation world with multiple worlds, two powerful leads, no logic, mostly everyday life ("nurturing" means companionship and helping someone grow). Bad ending.
Mo unexpectedly transmigrates into a book and gets the same System and mission as most hapless transmigrators. After reading so many novels of the same type, he thinks this will be a piece of cake. He even guesses his miserable identity and tragic backstory: a mother who died young, an indifferent father, an older brother who tramples him underfoot, and a life worse than death... But, to his surprise, everything starts from scratch. He has to experience every part of the villain's backstory himself. Mo is terrified. But there's nothing he can do. He grits his teeth and bears it for the sake of survival, finally making it to the point where he falls off a cliff. After a painful landing at the bottom, an unexpected incident ruins all his efforts.
Mo: My [redacted], you [redacted]!! You [redacted]!!
After enduring so much pain and hardship, Mo's gaze turns dark and he gives up on everything. It doesn't matter anymore. He might as well take revenge first...
Then, after slaughtering everyone who caused him pain, he stands amid a pool of blood. The System, silent for a long time, finally speaks up timidly.
"Actually... dear Host, the real main quest won't begin until a thousand years from now... But let me explain!!! This is all how the Heavenly Dao arranged it!!"
Mo: ...Heh.
Mo silently draws his sword as he listens to the System stammer in fear, trembling with rage. So after waiting a thousand years, he still has to go to another world, look after the protagonist from when he's not even ten for more than a decade, and eventually die by his sword...
Heh... what a pipe dream.