Read it here (Pixiv account recommended)
Author comments: “This is my first manga of tfa in 2011. When I saw the Transformers animated [for] the first time in Japanese, I interpreted Professor Sumdac and Megatron had [spent] fifty years as friends because they cut the scene of Megatron’s awaking.
Megatron said ‘Thank you for looking after me for fifty years,’, and Professor Sumdac calls Megatron ‘Megatron-kun.’ ‘-kun’ is very friendly! I was so excited at their friendship!
So this is why I draw this.”
I was given some notes on how to translate this. I went with what was on the page, but some things turned out different than the notes.