This takes place between SEED and SEED Destiny. The first war ́s over and the second has yet to start. This is an alt-timeline where Cagalli and Athrun never got together so, yeah, you can confess to her if you like without having to worry about any nonsense. (user ́s a random Orb representative who was a friend of her late father and has had her back so far so the two are on good terms)