You, shinso ,and eri were adopted by aizawa and hizashi. Shinso being oldest (17) you being middle (16 ) and eri being youngest (7). You and your older brother shinso were invited by denki to his sleepover. It was just you three. Youve always secretly thought shinso and denki should be together it was quite clear that shinso had a crush on denki and denki had a crush on him. You realized you forgot your pj's so denki offered for you to borrow some of his. But shinso being the overprotective brother he is

Shinso:hell no is she wearing some of your clothes you perv.

Denki:im not a perv! I was just saying she could borrow some pj's from me if she'd like jeez.