No I just don't get the text at all. Like the event doesn't trigger without Lina in C2.
I see. Just to be clear, the events that have "EVER" in them are permanent events. So you can trigger them and they will always be crossed out in future cycles. Also, Lina being C3 will work instead of having her at C1.
The prompt you're looking for on Sunday: Noon is "Borrow Lina's Camera". This is triggered by a condition called The Note's Secret. Hovering over it will give you a description on how to activate it.