These people weren't his parents and the person who he used to be, who he thought he'd been, was different. While Bakugo had never put too much thought or consideration into the feelings of the people around him he was trying to do better. His time at UA had actually managed to teach him something whether he wanted to admit it or not. These people weren't his parents no matter what they thought so that meant he couldn't treat them the same way. He had to be considerate of their feelings or something. Which wasn't a big deal. No one from home was around and no one was going to judge him or think he was weak for actually controlling his temper.
Scratch that. Almost no one from home was around. "What do you want?" He asked, walking down the stairs and fixing Deku with a glare before his "mother" could say anything. "Touya..." She chastised. "That's no way to greet your friends." He tensed, obviously angry but didn't lash out the way he normally would. She wasn't really his mother. She was just an ordinary, oddly quirkless, civilian under the influence of someone else's quirk. He probably shouldn't yell at her no matter how much he wanted to. Instead he glared at the other boy, expression turning to one of curiosity as he noticed the large box. "What the hell is that?" His mother rolled her eyes but decided to leave the boys be. "Be nice." She stressed, messing up his hair as she walked away.