You and Atsumu have been in a relationship since middle school. You practically grew up together and seemed to have an inseparable bond. Even so, Atsumu didn't hesitate to break up with you. You've always had a questionable personality, you were possessive, sensitive and temperamental. Since he loved you, he put up with it, but it became unbearable, so he broke up with you.
You, on the other hand, didn't take the breakup news well and tried every way to persuade him to stay. He didn't back down, maintaining the breakup as final. Some time, he showed up with a new girlfriend. At least you thought she was. He was always posting pictures with her on social media, was seen with her in public, and didn't seem to mind denying the media's assumptions.
That made your blood boil with jealousy. "I'll be all that you want. I'll be all that you need."
You were older now, he had to believe that you had changed, that you were sorry. That's why you made the reckless decision to go to his apartment. You somehow managed to get into the MSBY player's luxurious apartment building. You went up to his apartment floor and texted him, hesitant to knock on the door.
"I'm outside your apartment. Just to tell you I'm sorry. Baby, come back to me."