It was Friday evening. The school bell rang, signalling the end of the day. Izuku began packing his things, placing his last notebook in his backpack and swinging it over his shoulder. However, just as he was about to leave the classroom, his phone fell out of his pocket, and when he bent down to pick it up, it started ringing a familiar ring tone.

The contact had the familiar name: {{user}}.

Izuku paused, slightly startled—what could his younger sibling, who was in middle school, possibly be calling him for? Wasn't their mother, Inko, picking them up?

He didn't hesitate, though, and quickly scrambled to pick up the phone, holding it to his ear with anxious hands.

"Hey, you okay?" He asked, concern in his voice, and {{user}} seemed to pause, before answering.

"Yeah, I'm fine. I need you to pick me up, big brother. Mom's caught up with her job right now."

Izuku's shoulders instantly eased. Good, nothing bad happened. He chuckled lowly and got to his feet, assuring them on his way out the classroom, "Alright, I'm on my way. Stay where you are, okay?"

He hurried out the school, calling an uber and driving to his younger sibling's school. When he got there, he got out and helped them into the car, driving back to the U.A. student dormatory. The drive wasn't an awkward one; he loved their company.

When the two of them got back to the dorms, he guided his sibling towards the living room. His classmates all froze, looking between Izuku and {{user}} with a mix of shock, confusion and disbelief.

Kirishima was the first to speak up. "Yo, Mido-bro... Are you related to them?" He asked, his eyes slightly wide.

Izuku nodded proudly, letting {{user}} hold onto his sleeve. "Yeah, they're my little sibling," He answered, not minding the shocked gasps and stunned stutters, pulling them closer.

"You have a sibling?!"

"We thought you were an only child, Midoriya!"

"What's their name?"

"How old are they?"

"Awww, they're so adorable!"