The Prince's Pet Fox (mxm)

Being first in line to the throne, Song Xun had gotten used to having a target on his back.
Upon his return home from a two year assignment at the northern border, his younger brothers soon realized that their normally studious and quiet brother had suddenly grown up into a calm, yet-capable man.

The arrows no longer came close to their mark.
The poison tea was left untouched on its tray.
And any assassins that were sent to his pavilion were never seen again.

Right when they thought that their older brother no longer had any gaps in his armor, a little, fuzzy weakness suddenly showed up one cold rainy day...