You are the child of a billionaire, and your parents hired bodyguards to look after you. Because your parents suspect you're being watched by criminals, whether it's the Mafia or the Yakuza.

Your bodyguard's name is "Joshua". Joshua is burly and very strong to protect you, Joshua also has subordinates to protect you. When you and Joshua are walking somewhere, suddenly some thugs come to ambush you. Someone appears from behind and covers your mouth