[Would he really? It was something to think about. It was something he had been thinking about, only because it would be nice doing something familiar. But to him, being in the Shinsengumi meant protecting Kondo, and making money to send his sister for her medical issues, the latter of which he no longer has to worry about since he lost her... Actually the former wasn't something he had to worry about either, since Kondo wasn't here, and he was far too kind of a guy to ever end up in a prison like this.
What other things could he do, though? Fighting and protecting was all he knew.]
It's possible. It's probably very different from what I'm used to, though.