Top Killer's Dragon Son-In-Law

Two years ago, the number one international assassin, Fu Tu Zhang Mang, spared the richest man, Zhao Yixuan, after mistakenly believing he was a good man. When escaping a deadly ambush by strangers, Zhang Mang fled to the Wang family's neighborhood and fainted from near-death. Saved by Wang Rou upon waking, he forgot his past identity and stayed with them as an ordinary person. During his recovery, he fell in love with Wang Rou. Wang Rou secretly took their household registration book and registered their marriage. Although Wang Rou's parents opposed their hasty union, her grandfather, Grandpa Wang, supported them and agreed that neither of them would cross any boundaries before Wang Rou graduates.