Dragon's Slice Of Life - Chapter 21: Even The Degenerate Ones..

Zhao Feng works hard to prove himself better than peers in the Martial Arts Training Ground, but just when he's about to give up, a mysterious black, marble-like, object fuses with his left eye, granting him the powers of the ancient gods.With his newfound powers, Zhao Feng embarks on the journey toward becoming the greatest martial artist of all time.

Young Chen Xiang had a fateful encounter with a goddess & demoness and received their peerless heritage, divine pulses, ultimate martial arts, and transcendent alchemy techniques, which gave him an easy ride in his journey of cultivation.

Zhou Heng drank too much wine, and woke up to find that he had time-traveled, and there was a beautiful woman lying beside him. Just when Zhou Heng, a bachelor of ten thousand years, wanted to take charge, he suddenly discovered that this woman who had a relationship with him was called Sadako, and she was the Sadako in Midnight Ring.

Sadako is just Sadako, pretty and human, but the memories that come out one after another make Zhou Heng discover that his name is Takeo Saeki, and he is the husband of Kayako in the Grudge of the Great Evil Spirit.

Later, at work, Zhou Heng discovered that his female colleague had a strange identity. The daughter of his client, Mimiko Mizunuma, had always been very interested in him when she came into contact with him.

- Description from novelbuddy

The undisputed greatest doctor in Korea, Baek Gang Hyuk.