The Frail Young Master's Personal Bodyguard Is Actually the Prince?

Song Yunan, the second son of the richest family in the south of the Yangtze River, was frail since he was a child, but his family was wealthy and he had a brother who was four years older than him. He really fulfilled the fortune-telling destiny of the God of Cookery at that time. However, his doting brother wanted to pursue an official career, so the sickly young man could only resolutely shoulder the huge family fortune. Song Yunluo was so moved that Song Yunan touched the tip of his nose and felt a little guilty. In fact, it was not just for his brother, but also for the amazing glimpse of Longxiao Mountain. But fate is unpredictable. Before Song Yun'an had time to bring his property to Jing'an, the person he was looking for appeared in front of him, just... Why was he a little embarrassed? Fortunately, Song Yunan didn't care about this. He kept the person by his side and flirted with her, and finally succeeded in holding his little hand. I thought he was very capable, but I didn't expect that this person had already had ulterior motives for him. Later... Song Yunan looked at the hand on his waist and slapped it away angrily. "Aren't you going to leave? Why are you coming back?" "It is the subordinate's duty to protect the master." "Oh~" Song Yunan looked at the puddles on the ground, half-smiling, "Is it dangerous?" Xie Huaijin hugged her tightly without changing her expression, "The puddles have wetted my shoes and socks, and I'm going to be infected with the wind and cold. Master doesn't want to drink bitter medicine." Song Yunan: ... Is this a threat? Right! The writing style is a bit funny, mainly about sweet love, don't go into too much detail~