Manga Like Yongi Eomneun Sesang

The "merciful dragon" died. The imperial dragon, the symbol of the empire, has died. But it was something everyone knew. Jaha was an old dragon and everyone knew that his life would soon end. Moreover, the imperial family had a young dragon to carry on the next contract, so no one was confused. A knight from the Imperial Palace Safety Planning Department, Jinyoung Killis, is tasked with protecting the dragon's master who lost the dragon. Se Hyeon, the dragon's contractor, looks like a girl of about seventeen, but is actually a 123-year-old grandmother. It is the knight's job to protect her until she completes her promised mission with her dragon. But the only missions she promised the dragon were strange things, such as "shouting at a concert," "talking with friends," "praying at the graves of her mom and dad," "going to a casino," and "going to an amusement park." It seems funny, but if she fails to perform her contract or dies, it is said that a national catastrophe such as an earthquake, tsunami, storms, volcanic eruptions, etc. will happen to the whole empire as a result...! (Source: KakaoPage, translated)