Ma Dou So Shi (The Founder of Diabolism)

The Japanese manga adaptation of the mega-hit Chinese fantasy novel "Mo Dao Zu Shi".
　
During the time when the Wen clan was extremely tyrannical and the people suffered greatly, the masters of the cultivational sects, including the Gusu Lan clan, the Yunmeng Jiang clan, the Lanling Jin clan, and the Qinghe Nie clan, joined forces in the "Sunshot Campaign" to defeat the Wen clan.
The Yiling Patriarch, Wei Wuxian, made a great contribution in the "Sunshot Campaign". However, because the unorthodox cultivation path he created was so powerful, he was feared and slandered by the people. This eventually brought about his own downfall.
　
Then, thirteen years later, Wei Wuxian, who was supposed to be dead, is brought back to life through the "sacrificial ritual". There, he unexpectedly reunites with his soulmate, Lan Wangji. Wei Wuxian tries to leave without revealing his true identity. However, Lan Wangji, who was deeply disappointed in Wei Wuxian in his previous life and had parted ways with him, for some reason refuses to let him go…
　
As they pursue the lingering mystery of their past lives, Lan Wangji's hidden feelings begin to emerge, and the relationship between the two begins to change once again. The story of the cheerful and unrestrained Wei Wuxian and the calm and disciplined Lan Wangji dates back to their first encounter in their childhood.