I actually find this endearing. Hope most relationships are like this where even if it is the smallest stuff, find a way to communicate with your partner. People may find Chihaya's action in this chapter annoying but I find it adorable. She talked about it and went out of her comfort zone to discuss it with Akizuki. Akizuki also seek out Chihaya and went straight to the point of asking if he did something wrong without probing or acting smug about it. He is genuinely concerned about her. Chihaya is also aware that what she did was stupid but at the end of the day they both shared what is on their mind, understood each other and corrected it. No ifs and buts, no extreme reaction, no hiding it for a long time.