The Glitched Mage - Chapter 15: Mana Heart Upgrade

The protagonist, having degenerated into a “loser” after being unable to find employment, gets caught up in someone else’s attempt to commit suicide-by-train and ends up traveling to another world. The numerous cheat powers he demands from God are all granted to him. But contrary to expectations, these powers bring about disastrous consequences for the protagonist.

Having reincarnated into another world, the optimistic protagonist (Yuuri) starts his(her) heart-warming training days with his(her) teacher.

When he woke up, Xiao Junlin transmigrated into the novel he was reading, but he was not the protagonist, but the male partner’s father, who was still a licking dog.

“I have ruined your reputation for the first time. From today, my son will be relieved of all positions in the group.”

“Ding, the host cuts off the relationship with his son and gets a reward of twenty years younger.”

“Don’t call me uncle, the stinky girl only knows how to use my son. Starting today, you will be demoted and go downstairs to clean the toilet.”

“Ding, the host successfully suppressed the heroine, and obtained god-level investment skills and god-level fighting skills.” Killing the dog, suppressing the heroine, and winning the protagonist’s creation, Xiao Junlin found that he was gradually approaching the peak of his life. …

- Description from novelbuddy

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.

Xia Ming, a university student who just graduated, accidentally got hold of a system. Xia Ming became powerful! Medical skills? OK, I don’t have the skills. But on the following day, even the highly skilled doctors couldn’t be compared to him.

Force? OK, I’m not your match today but on the following day, even the Great Master would have to concede defeat.

Basketball? OK, I’m a fusion of the world, the strongest basketball star, would I be afraid of you?

Wife, that is even better. I have a beautiful President Lin, and a Missy who is like a rose. Each of them is beautiful, how are you going to compare to me? … … You guys spent a hard time learning skills, acting but I am different.

I have an Almighty System, what skills do I not have? As long as I’m willing, even the celestial beings cannot stop me. With Xia Ming’s words: “As long as the system is in my hands, the whole world is under my control.” I am Xia Ming, I speak for myself.

- Description from Novelupdates