Three Years Later, Only the Young Miss Remains in Longcheng

[Transmigrate into a book + heiress and loyal guard dog + one-on-one romance + two strong leads] Luo Li transmigrates into a book as the male protagonist's younger sister. She wants to take it easy and cling to her brother for support, only to discover that the male lead... is dead! And now someone is trying to kill her, too? Luckily, she's awakened a special ability, and she has a loyal bodyguard all to herself. But the more she looks at this little bodyguard, the more suspicious his identity seems. Are you really just a bodyguard? I'm really just your bodyguard.