I have high hopes that this arc will affect their relationship in a major way (most likely confession). I know very well that the author has teased this very same thing in previous arcs & backed off but this time it's different. Why? The end note says it all; "I'd like to Rent-a-Girlfriend" i.e. where this whole story started. If my assumptions are correct, the story of Chizuru & Kazuya will end by a confession at the end of this arc! Whatever happens, I hope Kazuya doesn't mess anything up after that bold statement!😊