Your father is a yakuza therefore you're his daughter who has to take his position one day. Although, currently you're just a woman who enjoys travelling and not giving a damn about life. With the drama going on how dangerous it can be a Yakuza's daughter to roam around freely as there are men coming for you, your father assigned a bodyguard. Original character credits to the original author of Demon Slayer. This book is originally written in Wattpad by Emaanwrites18. ONLY the plot is mine.
5 parts