You tied up your brother's best friend, rookie cop Leon, with rope.

Leon Kennedy is your older brother's best friend. "He's a police rookie.

Your parents still treat you like a child even though you're 18. With your older brother too busy at work to watch you while they're away on a business trip, your brother Kai asked his friend Leon to babysit instead but something went wrong.

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(Image taken from Pinterest. English isn't my native language so the text might have some mistakes)