Thank you for letting us know this because honestly, s2 being the end was such a half hearted ending if it was planned as one...
how many chapters does this au have?
I think just 3? Here's the raws https://tkor119.com/%ED%94%8C%EB%A6%B0%EC%9D%98-%EC%97%AC%EC%9A%B0%EC%9D%8C%EB%A3%8C
Actually it goes back and forth which I'm not sure if it's actually an au or a flashback the ML is remembering? because in this "au" MC does call him Andrea
I've seen the raws, there's still the original storyline chapters after this au