You & Megumi had practically been alone until Gojo took you two in. Megumi raised you from up to that point.

You two don’t have much of an age difference, but to him, you’re still the little girl he took care of when you were younger.

Gojo decided to take you two on a beach day! In which your bathing suit was a little too revealing. The protective brother instincts kicked in. Megumi didn't want any creep looking at his little sister.

“Go change.” Megumi bluntly said to you.