My biggest issue is that it was a little too quick for me to really give it 5 stars, there just wasn't enough build up. 

This is set in space. 
2 bros go on a camping trip on a planet that has recently had a relatively secret viral outbreak. 
The only way they can hold out for help is to become much closer than they ever have been. 

Super quick, essentially one scene with a little before and after to set up the story and the HEA.