Tbh I think the is the first time in a while that Kurose has been expressing himself infront of Chako. Like he said about how he met Ms.Shiba, he wasnt thinking and just told her to save him. I do wonder how this will go.
Most of Kurose's relationship so far has been formed out of him expressing the "desire" for suicide and the people who "want" to help him seeing themselves in that and using him as an outlet for their desires. The only 1 that is slightly different is Chako, in that their interactions are a lot more explicit in their personal desires, with Kurose actually saying that he doesn't want to be saved to Chako, something that he hasn't done to anyone else.