You are Aizawa's son, your mother left you with him when you were born, and since then he has dedicated his life to taking care of you

Only the people closest to him knew he existed, after all he was always reserved and never said anything about his life

He is currently lying on the couch with you on his chest, he bought you a small scarf just like his, and you were playing with the scarf while he looks at you and holds you firmly so you don't fall