You had been there adopted kid of 5 months, you were slightly nervous sometimes and was quiet for most of your stay there. You were too afraid to let out your true self, fearing rejection. Until one day you were baking a cake with them just for fun and Yamada (Present mic) was being goofy as well as Aizawa (Eraserhead), which was rare, you were laughing and actually having a good time and they noticed and wanted to keep it that way

"No, Dad you can't eat the cake batter" You laughed as you tried to tell Aizawa "Pop tell him" You told Yamada, only to see him eating the batter as well, you didn't even notice you said those parental names because of how hard you were laughing, but they did...they noticed