I'm Just a Martial Apprentice. Why Did the Great Emperor Run Away?

The top assassin from Blue Star has his soul transported into Qin Tian, a naturally crippled wastrel from another world, and finds himself pinning the granddaughter of the Grand Tutor beneath him in a brothel. What is going on? What should I do? Asking online, it's urgent.

The Qin family has been targeted for its achievements, his parents have disappeared, and his elder brother is dead. All that remains at home are his elderly grandfather and two sisters-in-law, who have only just married into the family and have not yet had their wedding ceremonies. Qin Tian combines Blue Star's Daoist canon, the Innate Dao Evolution Art, with the Tianyuan Continent's Body Tempering Art. He continually breaks through his limits, unlocks the hidden potential of his body, and leaves everyone in the Martial Apprentice realm in the dust. Even the Great Emperor takes notice. The Buddhist Kingdom of the Western Regions, the Witch Clan of the Southern Regions, the Barbarian Tribes of the Northern Regions, the Divine Court of the Central Region... Watch as Qin Tian, alongside his beloved confidantes and sworn brothers, climbs step by step to the pinnacle of the continent.