I think they're both aware that they're acting; it's why Yukiya switched gears and acted so obvious. He's basically telling her he's smart enough to not say anything as answers to her fake concerns.
Not sure for the significance of the kumquats tho, I might need to reread past chapters to get it.
Oh yeah I remember watching this episode on Netflix and got confused because I haven't seen it in the manga. So it is from further chapters!
Thanks for the chapter!
I really like this one; the contrast between someone who grew up in a loving family who had enough self-confidence to brush off criticism he doesn't care about, and someone who didn't get enough love growing up, ended up seeking it from other women in return, and also likely criticizing others...