Konoha's Tag-System Ninja - Chapter 5 - : Sakumo Hatake!

The Thousand-Year Clan, the Ten-Thousand-Year Battle, deities play games with mortals' lives, fostering myriad tribes like nurturing parasites — with defeat meaning oblivion and victory ensuring sole survival.Only the one who prevails can earn the gods' faint smile.A youth named Qin Chuan, endowed with the power to stop time, leads humanity into the battlefield of countless races, only to discover that this is not their first foray onto this battleground...

In this world, orphans or just anyone without any hope for this world can apply to become a “walking target”. Their sole purpose is to be a practicing dummy for the students of the sect who train to become “Demon Hunters”. These students need “walking targets” to test their training on living, walking beings of flesh and blood.
In exchange, they will be provided with food & shelter.
Their existence value is lower than a slave, but if they manage to survive a few years they can receive a life long pension.

Xiao Han is such a “walking target”. One time he witnessed a powerful Demon Hunter disposing a demon. When the demon died, a fragment of the demon that managed to escape entered Xiao Han’s heart. No one saw that, and even Xiao Han himself only felt some discomfort for an instant.

But that thing in his heart soon gave Xiao Han visions, and the first one is of a cultivation method which allows Xiao Han to absorb damage to enhance his body. A perfect cultivation method for a “walking target”.

- Description from Novelupdates

When an unlucky, awkward virgin dies in the most humiliating way possible (you don’t wanna know), he wakes up not in heaven… but a mechanical construct powered by divine magics built for a single purpose: Sex.In a fantasy world cursed by a sexually frustrated demon queen, men can’t keep it up, women haven’t had a decent orgasm in centuries, and birth rates have plummeted harder than masculine egos. Society is teetering on the edge of population collapse—and the only thing standing between mass hysteria and sweaty salvation... is him.His new owners? A smoking-hot, elven herbwitch MILF and her fiery half-dwarf, half-elf genius daughter who created him as their latest “intimate invention.” After a magical screw-up gives him a soul (and an upgrade below the belt), he becomes the only pleasure unit capable of leveling-up his powers of pleasure, independent thought—and maybe... emotional connection?Now powered by aphrodisiacs, awkwardness, and sheer mechanical stamina, our hero must navigate lusty labs, intense moaning missions, and a society starving for satisfaction... all while trying to survive being “tested” and “reviewed” by every noblewoman, monster girl, and lonely tavern wench in the realm.------------------WARNING: May contain excessive thrusting, magical lubricant, seductive stat screens, and one very confused virgin trying to do the right thing! Reader Beware... and bring tissues.

Satou Shiki a Japan present-day university student suddenly one day he got attacked by a slasher when he open his eyes he was already transferred to another world’s labyrinth city. In that another world he who was awakened to do a lot of “things”.