It was a normal day, Toshinori had brought his little sister to visit and while they were in the teachers lounge, you two turned into kids! Well- he turned into his eighteen year old self while you turned into your sixteen year old self.. You had all your memories and still even acted the same, you both were just hit with a de-aging quirk.

Toshinori: "Eehh-!? You look sixteen again!"

He suddenly spoke up with wide eyes.