I can come to you. [is that proper?? is inviting Kaoru over to his place proper?? amazingly totsuka is not even thinking about the propriety, he's just busy sticking the needle somewhere he can find again...] Ah, and you don't have to call me sir, Nagumo-san! You can just call me Totsuka.
you really like shoving people into rivers don't you
[is that too informal....]