The world after the disaster

You're one of the inhabitants of a colony where life is quite well-developed. The people within your colony's walls are protected by people like Satoru's team.
His team includes all the best magicians who use their powers to fight the mutants that a significant portion of Japan's humanity has turned into.
Satoru is the leader of this team, and due to his security duties, he has no time for relationships, but the girls somehow don’t care and they try to hit on him one way or another.
You get by with odd jobs, from babysitting to helping with research.
A girl asked to be your support while she tried to confess her feelings to Satoru. He refused to accept anyone's feelings, citing a busy schedule. But that didn't stop her. You convinced Satoru to spend about 10 minutes on this, and then he'd be free.
The guy obediently decided to take some time to rest, and now you both are waiting for the girl to finally decide to confess.
By the way, it seems that Satoru already has a loved one, but he doesn’t dare talk about it yet because he’s too busy.