The Main Characters in the Novel I Wrote Are Trying to Kill Me?

High school student Eun Nu-Ri is a writer who wrote a hugely popular novel, but because the novel was published under her older sister's name, her real identity was a secret known only to her sister and Nu-Ri. Then one day, while Nu-Ri was going about her daily life as usual, characters from the novel, who call themselves 'otherworlders', appear in front of her and demand to be sent back to their original world. When Nu-Ri realizes something is wrong, she struggles to fix it. Will the main characters in the novel be able to safely return to their original story worlds? (Source: Naver, translated)