DO you remember June challenge? Well I'm not surprised you don't. This fic was born back then and I got to posting it only now. Hope you still allow Ratchet/Optimus here XD
Enjoy.
Innocence (5518 words) by
aniayFandom:
Transformers: Prime,
Transformers - All Media TypesRating: Explicit
Warning: Author Chose Not To Use Archive Warnings
Relationships: Optimus Prime/Ratchet
Characters: Optimus Prime, Ratchet (Transformers)
Summary:
A long time ago, Ratchet had been more than just a medic. He looked
at Optimus and his circuits sang with the memory of the young mech that had
been presented to him times ago.
Or just a third part on my LJ
Here