From Londoner To Lord - Chapter 76:75. Perpendicular Lines

A 30-year-old NEET is reincarnated into the body of an otaku that choked to death on instant noodles. As he comes to grips with his new life, he realizes that this world is subtly different from Earth. The denizens of this world are far better looking, and this new world also possesses futuristic technology as well as mysterious Yin Yang masters!

Bai Qingqing, the disciple of the Divine Physician, with goodwill, treats the domineering Prince for blindness, only to render herself at the mercy of him. In the name of practicing medicine, the doctress makes him have spicy cuisine for every meal as revenge. Seeing him frown upon the food, sweat at the pungent dishes, she is merely stoked! Poor Qingqing is no villain material, she ends up having a soft spot for him. Her tender care for the Prince unknowingly reveals her biggest secret-her true identity. After the prince’s eyes are cured, he mobilizes the military with great fanfare to keep her around…

Liu Fang, a manager, died suddenly at work due to being too diligent.
She thought that she would turn into a wisp of dust and dissipate after her death, but she never imagined that – the new century, the new underworld, even if she became a soul, she would still be a worker!

Liu Fang has become a newcomer to the underworld Quick transmigration Department. In order to wait for a good reincarnation, she strived to accumulate merit and traveled into one world after another to repair the way of heaven.

- Description from Novelupdates

Yuan was born with an incurable illness that left him blind at a young age and crippled a few years later, rendering everything below his head useless. Deemed hopeless and irredeemable, his parents quickly gave up on him, and the world ignored him.