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When Papa and Daddy first introduced Jirou as his new sibling, Izuku had been scared. He must have been too annoying or boring and this was their way of telling him they didn’t want him anymore.
As though they could read his mind, Papa and Daddy were quick to reassure him that they loved both JIrou and him equally. That made Izuku guilty for even doubting them but it was quickly forgotten because he learned that Jirou was an amazing playmate and an even better sibling.
It was quiet when he woke up. He couldn’t hear Jirou’s humming, Papa’s voice, or Daddy’s grunts. He was wet and hungry but there wasn’t anyone around and he was all alone. Before he knew it, there were tears running down his face and it was getting harder and harder to breathe.
All of a sudden, hands wrapped around him and he was lifted into someone’s arms. He cracked his eyes open slightly, immediately recognizing the person who held him. Daddy returned his paci back to his mouth before he began to pace around the room, rocking Izuku back and forth. He closed his eyes, pushing his body closer against Daddy, content with the ongoing cuddle session.
Opening his eyes again when he felt the warmth separate from him, he found himself laying on the changing table, Daddy already halfway done with changing his diaper. Daddy also changed his All Might onesie into a Hawks T-shirt, soft pants, and fuzzy dinosaur socks.
By the time they got to the living room, Papa and Jirou had already started decorating the tree with bright lights and sparkling balls. Daddy place him down next to Jirou before he left to do something Izuku couldn’t see.
Jirou smiled at him, placing a yellow ball into his hand. It was so shiny, Izuku could see his own reflection on the ball. He wondered what he was supposed to do with it. Maybe it would taste good? He spat out his pacifier and brought the ball into his mouth.
It was cold and smooth in his mouth, definitely not as nice as his paci but it’ll do until he found his pacifier from wherever he dropped it. The ball had only been in his mouth for a few seconds when Jirou reached out, pulling it out from his mouth.
He frowned at first but Jirou stuffed his pacifier in his mouth before he could voice his protests. He stared at it, eyes crossed for a few seconds, and then decided it was better than the ball. To thank Jirou for finding his paci, he gave her a big smile which she returned while hugging him, making a warm feeling bloom in his chest.
Another ball was placed in his hand, this time by Papa and he was lifted up and settled onto one of Papa’s arms. Papa’s fingers wrapped around the hand that held the ball and guided it towards a tree branch. To his surprise, the ball stayed on the tree.
He didn’t have much time to think about that though because the next thing he knew, he was sitting on the couch, watching Daddy light the fireplace. Papa started to gently push spoons of katsudon into his mouth but once he saw Jack Skellington on the TV, he stopped paying attention to what was going into his mouth.
Sometime during the movie, Izuku felt Daddy pull him into his lap., laying him down sideways before the familiar rubber nipple of his bottle was eased into past his lips and warm milk spilled onto his tongue. Slowly suckling his bottle, Izuku decided that he was glad that Papa and Daddy and Jirou were his family and he wouldn’t trade them for anything in the world.