I want to talk about the choreography of this scene.
When Henry pulls back in shock and turns to leave, he keeps his back to Hans.
Hans apologizes, visibly distressed, but Henry's not looking at him.
Henry, still not having looked at Hans, makes his way to the door. Then, as he's about to open the door (his hand has already reached for it), he finally takes a look at Hans. And it's just the briefest glance, but sees Hans looking distressed. And you can see him almost immediately make up his mind and locks the door to go and kiss Hans.
Just one look at Hans. It's all it takes for him to realize that he does want this, and he's not going to run away fro m it.
"Audentes fortuna iuvat." "I'm never going to run away from a fight again." This happens at a point where Henry has started to question whether he should always choose to fight (figuratively in this case) in the face of danger. In a way, this is him realizing that being brave is to fight for the ones you love. So this fight, scary as it is, he isn't going to run from. Because he sees the hurt on Hans, who he has sworn to protect, and he has to do something about it. So he kisses him back.
While I'm on the subject of Henry's protectiveness, I will make my second observation about this scene, which is the contrast between their hand placements when it's Hans who initiates the kiss vs when it's Henry.
Hans softly puts his hand on top Henry's shoulder, like he's saying "Don't go." And his shock afterward tells me that he didn't plan on kissing Henry. But he saw Henry possibly leaving for his death, and his body instinctively reached for him, before his mind even caught up. So that hesitant hand on his shoulder is just a beautiful detail.
Henry, on the other hand, has made his decision. His hand placement when he kisses Hans feels more deliberate, gently cradling Hans's neck, a comforting gesture. And that further showcases what I mentioned about Henry's protectiveness towards Hans here.
Where I'm going with this post, is how remarkable it is that they've managed to convey all of this in the scene. It doesn't feel like a gratuitous love scene, but like a carefully thought out resolution of their feelings, that have built up from the beginning of the game. An everyone involved in the making of this scene deserves all the praise for how beautifully it came out.