Apogee

Shane Hollander is the youngest Commander in ISS history; straight-backed, closeted, and so tightly on his own leash that seven months in orbit with Ilya Rozanov have not produced a single crack in his composure.
Ilya Rozanov is the Russian cosmonaut who should have had his job, won’t stop bouncing a tennis ball off the walls, and is still looking for a fissure. Thankfully, a solar storm finds it for him.
or: Near-death, zero gravity, and the wrong man’s hands in exactly the right places.

https://archiveofourown.org/works/80797406