[ Maybe it's that Shinpachi doesn't want to talk about Sannan having found out, but he doesn't take it to mean that way - when she says Sannan won't do anything, he figures she's talking about herself, that she won't let him take her blood. Not that he was planning on letting anything like that happen anyway, but he's realistic enough to realise that the other guy is probably going to find some time to harass Chizuru when he's not around since Hijikata or someone else sent him out for an errant. So hearing her promise to make sure of it herself too is slightly a relief, although it changes nothing about his own problem. But then again, he's already decided that her problems are his problems as well. If not just because the thought of her being used as a shield or some sort of test subject by anyone in the Shinsengumi at all makes his blood boil.

His chest feels tight, and smiling doesn't come as easily as he'd like it to (to reassure her, if nothing else), so he still looks a little lifeless in a sense as he hooks his own pinkie around hers. ]

Well, I guess you do always live up to your promises. [ She tried to help their last promise stay true as well, after all. ]

It's not just something you have to reassure me about though. I'm gonna be there help ya, you know that. Even if Sannan-san puts it like that, no one's gonna force you to do anything as long as I'm around.

[ Or so help him god he'll throw the biggest shitfit. ]

But.. yeah. [ His own pinkie's hold tightens a little on her own. ] .. It's a promise.