DxD: Matsuda? - Chapter 27: Rias × Issei?

Traversing to another world, Lin En is captured right from the start. The captor is the antagonist princess from the original work, intending to control him by using him for hypnosis experiments. In a critical moment, Lin En comes up with a quick-witted plan, feigning the success of the experiment and deceiving her with his acting skills. But this was only a temporary measure. Because in the original story, her ending is very tragic, and none of her associates meet good ends. Hence, Lin En must pretend to be under the hypnosis while secretly being ready to flee at any moment. But gradually things start to take an unexpected turn. ... The Princess’s Diary [The experiment was a success!] [As the sole specimen, I’ve decided to keep him by my side.] [Due to the curse mark on my face, I am loathed by the public, but he says I’m beautiful.] [I’m happy because people tell the truth when hypnotized.] [Alone with him, I impulsively kissed him.] [The feeling was strange and made me lose my composure, fortunately, he won’t retain any memory of it after the hypnosis is lifted.] [So, it’s okay to be a bit bolder, right?]

Kwan Dae-ha.

Yours Truly shall have all of you bow down to me!

Arriving in this brand-new world, Lin Fan found himself in possession of a system which allows him to level up indefinitely unbounded by the limitations of this world. Upon learning a powerful technique of Monkey Steals Peaches, Lin Fan realises that he’s poised to literally become the strongest person in this entire world. But of course, how boring would that be unless the whole world gets to know about his great name?

Shameless. Righteous. Smart. Lin Fan will let no one (or balls) stand in his way to glory!

- Description from Novelupdates

Killing a person in ten steps will never stop a thousand miles away!

The evil leader broke through the barrier of time and space and became a descendant of Chinese medicine.

An era in which traditional Chinese medicine is in decline and ineffective.

Medicine is declining

Budo is fading

humanity is sinking

Under the surface of the peaceful world of singing and dancing, there is another treacherous and unfathomable world.

Experts can cure diseases, and national players can save people’s hearts.

- Description from novelbuddy