This might be the best chapter of the series so far. Kurita is finally taking an active role, stepping into the lion's den to support her friends instead of just standing around worrying like she normally does. And Kaibara's explanation of the tea is clearly a parallel to Kurita and Yamaoka's relationship. Tea is refined and welcoming, symbolizing Kurita. Kombu is salty yet the backbone of Japanese cuisine, symbolizing Yamaoka. They are both glutamates, as he explains, but they symbolize how the two people are the gourmets that work together to bring out the best in each other. Kurita cuts down Yamaoka's "brininess" exactly like the tea. Now we see Yamaoka rushing off to join her, where I'm sure they'll work together to create a drink combining the two of them. I haven't read ahead but this is, again, actually good writing.