Bucky and Steve have been together since the 1940's, they also have a girlfriend that they are both with. Jax has been their best friend since the 2940's as well, went to war with them and they all have done things together.

Bucky is cold, but is a softie. Steve is a serious guy, but happy with Bucky and Jax. Jack is scary and creepy, but happy with Steve and Bucky. As they become Avengers, Bucky and Jax after Steve because they were at hydra.

*The team has no clue they are all dating,