I liked this, but man, I wish it'd been longer and more comprehensive.
Joss Aaronson lives in Australia in the future, where time travel has been invented and one can go to college to learn how to do it, people can be created out of a mix of genetics in a petri dish, and aliens (Chorians) have arrived on Earth for an exchange of knowledge. Joss is the daughter of famous media star Ingrid and she's been pretty much ignored by her mother for years--but at least the connections helped get her into time travel college. Joss is also a musician, and looks forward to using time travel skills to investigate music history. Even if the program requires partnership, which Joss isn't so much into.
However, a Chorian named Mavkel has been admitted to the program, and he needs to scan someone as to who's appropriate for him to match with. He's a match with Joss, much to their delight. Joss likes the idea of getting to know an alien, even if he has heightened security measures around him. As for Mavkel, Chorians are basically hermaphrodite twins, and he lost his twin to death fairly recently. Usually Chorians don't survive alone, so the government is trying to figure out what to do with Mavkel and if he can be saved. Can Joss help? Mavkel needs to bond--REALLY PSYCHICALLY BOND-- with Joss, but somehow he can't do that all the way without knowing who Joss's sperm donor father was. Since the evidence has been deep-sixed and destroyed in Joss's time, they'll need to do some time travel to figure out who it is.
Honestly, the one thing wrong with this is it was a little too quick and fast for me. I like Joss as a character, and I like the earnest and sweet Mavkel, and I liked Joss's parental issues with her mother and with her former stepmother Louise. When Joss goes back in time, it does fill in holes in the story and makes things in the plot work. Even if the big revelation of Joss's parentage is a little weird and vague in some ways (why that dude donated sperm, I do not know), and beats me why that's a thing for Chorians, overall it works. I also liked how Joss's music skills tied into the plot and especially with what Mavkel needed emotionally and physically. I just wish it was...a little more filled out? I just felt like some more could have been done with it, and I'm not sure I can really explain why. Maybe I just wished it was longer. But also, there's barely anything ON actual time travel until it happens (how's it going? beats me), and there's not a whole lot of candidates for who Joss's father could be, so that's not a enormous shocker to the reader, more like a "Oh, so that's why things are going like that."
But overall, cool story. Three and a half stars.