deny it on day 21 does nothing to "route C" because I only did the ones after it and I got main character to say it
That why i said or/and. To get locked out of "Route A" and get the "Route C" you need to mess up atleast 1 of 3 choices. "Tell the truth / Deny it" on Day 21 is one of said choices. I was able to get Route C even by messing up just the first choice.
Ok makes sense even if the or/and is like near halfway down the message