Ideal Dolph and Sam dynamic to me is Dolph having a massive crush on the man and Sam knows Dolph is down bad for him, but the feeling isn't mutual and Sam's way of gently turning down Dolph is acting completely oblivious to Dolph's flirting
Plus Sam is bored and finds it hilarious how awkward Dolph gets
Mutsuki and Urie: Listen. LISTEN. The communication issues. It's so *chef's kiss*. Urie is more or less canonically in love with Mutsuki after that time he impaled him and instead of getting mad Mutsuki gave him a hug. But he refuses to admit he cares about him even though it's fairly obvious that he's his favorite person. Also Mutsuki is obsessed with their teacher, who after a series of traumatizing experiences he stalks and tries to murder, so that's another rift in their relationship. Urie is so clearly jealous and also enables Mutsuki's unhealthy coping mechanism by just ignoring the fact that there is definitely a problem until it becomes too big to ignore and Mutsuki inadvertently nearly causes an apocalypse. And then they fight and Mutsuki tries to kill Urie. They're both such deeply fucked up people and they have such huge communication issues that they're practically on different planets and they've each tried to seriously hurt each other multiple times and they insult each other (or Urie insults Mutsuki before he falls deeply in love with him) and also Mutsuki is somewhat canonically trans and it's Not Handled Well but also they're an amazingly fucked up shit and I love them