Magpie Treading on a Branch

The eldest princess's son, Shen Qiyuan, was young but quickly gained the emperor's favor and held great power.

In Daqian, one can have whatever one desires, whether it be wind or rain.

But Liu Ruyi is neither the wind nor the rain.

She is an untamed warhorse under the scorching sun, and an inextinguishable flame in the torrential rain.

It was a beautiful dream he both hated and longed to touch every night.

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Shen Qiyuan X Liu Ruyi

The story features a demon god, with crime-solving as a secondary element and romance as the primary focus.

It's a fictional story, so don't get too hung up on the details.