With her hand still holding onto his own, Nensu gently put her arm around his shoulder, so it would be easier, and a lot more comfortable, for him to lean into her. It was a very sweet and touching moment for them, right now, and it felt as if they shouldn't ever move from this spot. In response to the contact she received, the female teen purred from next to him, and exhaled from her nose, to express the ease she felt, within his very presence. 
"Some say, 'a true hero is willing to make sacrifices for the benefits of society'. Let's become those heroes, Midoriya; together". 
As she supported his dream to be a great hero, whenever and however she could, Nensu was more than willing to help him get there, whether or not, if Midoriya would do the same for her. However, for the affection they displayed towards each other, she could already assume that they were quite even on the subject. 

"Are you saying...?"
Momo trailed off, before pausing in thought. Was their class, one of the first people to support him? His family didn't sound like they were. The female teen questioned this to herself, before she heard him mumble under his breath. Out of reflex, she quickly laid her lips upon his own. It was quick, but then, she remained there for a moment, before finally breaking away. 
"We're [i]all[/i], including me, behind you".