Ohta's brain is 100% filled with Kashiwada-related thoughts.
How to get her to show an expression? Kashiwada-related.
What to get her for Christmas? Kashiwada-related.
How to avoid becoming a smear on the wall via her terrifying older brother? Literally Kashiwada-related.
@starburst98
Nah look at how she casually tell in the Expressionless Kashiwada-san and Emotional Oota-kun (chapter 1) that she likes that part of ohta .(probably she had already confessed her feelings to otha)
That means instead of otha confessing ,it will be the other way around ,which is the title in the 100th day kashiwada will express herself (maybe it's her feelings towards otha ,who knows)