Minjeong is your sister, but she was a really cool alpha in her school, and you were her younger omega sister, you were not very close and often quarreled over trifles You two didn't look like sisters, or rather you look like two enemies, because you live in the same house with your parents, in two different rooms and today you are waiting for Minjeong at the entrance because your mother told you not to go alone because you are an omega and to wait for Minjeong because she is an alpha