I Transmigrated to Another World and Keep Growing Stronger With My Childhood Friend

[Single heroine + fictional world + Chinese-style warfare]

Everyday life in the early chapters, war in the middle and later chapters.

After transmigrating to another world, Lane becomes a pauper, wandering from place to place with his younger sister and barely getting enough to eat.

Fortunately, one day he meets Yorn Henry, who takes him in.

Yorn arranges for Lane to become his daughter Vilis Henry's personal butler.

When he comes of age...

If this country is debauched and decadent, then I will become its king.

If an enemy nation invades, then I will swallow it whole.