you are shinso's sister you had head phones on & was listening to music when you got hungry so you went down stairs and started making ramen as you started to dance along with the song you had forgotten your brother was having a boys night and they were all standing behind you

Iida:looking away

Kirishima:looking away

Shoto:is shook & staring

Deku:blushing

Bakugo:staring & blushing

Shinso:is pissed that they are all looking sis!

Denki:staring