It’s sooo goood… my little heart aches. Here’s some rough translation for my easier re-reading. Hope it’s not a problem. I’m not a native to both languages.
Optimus: Then, why don’t we make a cake together?
Megatron: It’ll be better if we do respectively. How can I cooperate with you?
Optimus: But cooperating will let us out faster.
Megatron: ……
They started making a cake!
Megatron: It seems that the door’s open.
Optimus: it does…… I’ll miss this. (そのような. 少し名残おしいな )
Megatron: What?
Optimus: We’ve destroyed something together before, but it’s our first time to create something (together).
Optimus: I hope this kind of relationship continues after we get out.
Megatron: That day will never come.
Optimus: …… No, it will not.