Seirei Tsukai no Blade Dance - Volume 11, Chapter 3 - The Closure of the Blade Dance

Others treated disease to save person, he treated disease to steal heart.

The Frost Goddess was deeply captivated by him. The gentle and kind beautiful teacher was completely enchanted by him. Even the cold and beautiful female assassin melted quietly because of him.

Competing in medical skills? He was the one who treated the Godly Doctor. Competing with backgrounds? Leaders rushed to him. What? You actually wanted to compete with him in a match for match? Looking at the gentle girl beside him, Tang Yu had a headache as he said, “Beautiful girl, how did you fall in love with me?”

- Description from Novelupdates

Lyle Walt is a young noble boy and heir looking forward to the day he can inherit his family’s territory. Except around when he was 10 year old, his parents started neglecting him more and more in favour of his little sister, Celes.
On his fifteenth birthday, he is challenged to a duel by his sister to see who will inherit the household and horribly loses, being cast out of his family. Afterwards, he gets treated by the family groundskeepers and receives the family heirloom Gem from him that Lyle’s grandfather had entrusted to him. From there, he begins an aimless journey with his childhood friend and former fiancée, Novem, and the Gem-turned-Jewel that houses the memories, personalities, and Skills of seven of his ancestors.

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?]