Why can't the Young Master let go of his Servant?

* This work is set in a fictional country, and the systems, culture, and social hierarchies depicted are fictional creations reconstructed according to the setting. [Farewell, Young Master] Soha, the personal servant to the second young master of a high official's household. Suddenly runs away from home, leaving behind a single letter. [I am utterly exhausted by the Young Master's stubborn, arrogant, rough, frightening, and willful personality...] He had his own desperate reasons. The young master he cherished had, of all things, become engaged! Though he ended up being dragged back before he could even get ten li away, only to stand before the young master once again. However, since ...