Feudal samurai warlords have a lot to deal with, hordes of soldiers, rival generals, new technology and tactics. But there's the little things too, like being a responsible parent, how to keep secrets from robot girls, and finding stuff to do out in the countryside.
It's tough to be normal though... when your Dad's Date Masamune!
Many a superhero has handed their powers down to another to carry on their legacy, to keep up the good fight and honour their good name in a brand new age!
Now it is your turn to inherit such a legacy! Just... not a very dignified one that is.
It isn't every day that one acquires superpowers. Or siblings. Or superpowered siblings. Honestly, your mother would probably prefer it if you stopped adopting people without asking her first. But adopting threats to humanity is better than being one, isn't it?