Responses
I definitely understand that i’m just saying they seem like they have a level of intimacy where they would be close enough to be less formal and call each other by their first names. It doesn’t have to be in front of everyone, but they’re humping and calling surnames. If not a first name, then a little nickname would be cute. Every culture has some type of terms of endearment.

Such a good story yet still I’m so annoyed. They’re still calling each other by their last names. This man is digging in your guts all the time and you’re still calling him Mr.? Wow I know it’s a small thing but… (● ̄(エ) ̄●)