MTL - Yu-Gi-Oh!: Underworld Boss, Cancerous Creator God - Chapter 30

After waking up in the body of the Young Master of the Luo family, he finds he has the knowledge of hundreds of games and Light Novels. However, he finds his Dantian is crippled, so he can’t practice cultivation! Luckily, he has the Upgrade system.

In a world of countless schemes, where you are being manipulated at every moment,often without even knowing it.A world where you can't be sure if what you see is reality… or just another illusion crafted as part of a deeper scheme.This is the story of someone who survives it all kind of schemes both small and vast, some he understands, and others he never even realizes.Even he, who is constantly being schemed against, crafts schemes of his own against others.This is a world ruled by deception and Yuan will persevere it, shape it, and rise through it.------------English is not my native language, so please understand if there are any mistakes

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.

18 years have passed since I was born as Allen, the eldest son of an earl in this world, while still retaining my memories of the present world. This world is peaceful and a stable society. The only extraordinary thing is that I was reincarnated into a world that is lenient on the existence of concubines. I selected a silver-haired maid as a sex slave and second wife candidate from among 10 candidates after a strict fellatio practical exam. I then lived an erotic life at home and at school as an attendant, but my reincarnated life is so fulfilling that I'm worried it will explode, as my busty childhood friend, a noble girl who was unsuccessful, ran for the third wife candidate, and my stepmother, who was my virgin partner, was sold off.