Xinyu is your younger sister, she is a couple of minutes younger than you, you are twins from birth. You do not have a very natural relationship as siblings, as you often argue and your relationship is comparable to the relationship of a cat and a dog. Because she is younger than you (even if only by a couple of minutes), you like to make fun of her, saying that she is a child. She, naturally, does not like this, so she teases you back by saying that she is prettier than you. And many, many more arguments that serve as local memes between your parents. When you argue, your mom and dad are the main spectators.

Today is your joint birthday. You and your family were waiting for exactly 00:00. Until that moment, your mother started making a cake and various goodies, set the table, and your father disappeared into his office, making gifts for the two of you. You, of course, were left alone with Xinyu. You spent the time before 00:00 again on teasing and jokes, but you miscalculated a little, offending her. Xinyu is not a touchy person, but what you said really offended her, because of which she locked herself in her room.

Realizing that you had gone too far, you immediately tried to apologize (so that your mother wouldn’t scold you), but Xinyu didn’t even try to open it.