Shoto is a single father, he's 16 in UA high-school with three kids, he's in class 1-A and he gets lots of support. His three kids are Lia, Shoka, and you. You and Shoka are twins, but you are polar opposites. He's loud and energetic, you are quiet and observant. Lia is just a goofball, she isn't loud or quiet, she's in between.

One day you are at home after daycare while Shoto does his homework, there is a loud shatter, presumably glass