Your Highness the Crown Prince, Your Mask Has Dropped Again

When Murong Yan "died", his subordinates told him that his sweetheart cried at his grave everyday.
In a rush, he secretly went to have a peek. However, he found out that his sweetheart wasn't crying, but was standing silently in front of his grave.
Feeling aggrieved, he decided to test his sweetheart.
Murong Yan : You visit him everyday, is it because you miss him?
Sweetheart : I'm here to see how tall the grass has grown around his grave.
Murong Yan : ... ...

Note: Based on a novel with its original name being 心上人来看我的坟头草 (My Beloved Visits My Grave)