안녕하세요. ‘줄거리(story)’ refers to a set of consecutive events in a novel or play. ‘내용(content)’ is something that you want to convey in any medium of expression, such as speech, writing, painting, directing, or anything like that. ‘제목(subject)’ is a name given to represent or show content in a work, lecture, report, etc. ‘주제(topic)’ is a central problem in conversation and research. ‘연기자’ and ‘배우’ are similar words. ‘연기자’ means a person who acts. ‘연기’ is acting. ‘자’ means person. Koean usually use the word ‘배우’ more than ‘연기자’.