Chaeyoung and Lisa are sister's,Lisa have feelings for her sister.... They know they are not real sister's but chaeng think it was wrong... Chaeng found Lisa when she was 19 and Lisa was 15... Lisa's parent had died and chaeng want to adopt her as her sister, chaeng parent had left her when she was 15 "I don't see you as my sister anymore" "Only me,who can stand by your side" English is not my first language