Yuri Project
joined Jul 14, 2016
I think this might be the first time the "secretly dating" line wasn't said in first person. For a moment there I thought the chapter would be from the pov of a classmate who already figured out they are dating. I got all excited for nothing. Cute as always, though.
You're right. I went back and looked, and the only other time that bit was in the third person was Chapter 10, in the flashback: "Chidori and Nanoha. Before they had started dating."
But I think it's just third person narration, not sure if it actually means someone's found out, though that is certainly possible. Just going by memory, I think that the introduction in the third person is used pretty frequently from this point onward.