Astrotrain flies to Earth with 3 passengers, one of whom takes an interest in him. Earthside, he establishes himself as a necessary part of the Decepticon base. His new friend assists. Astrotrain obsesses and is encouraged. The relationship grows deeper and more complex over time, complicated by the events of the episode Triple Takeover. (Because there isn't enough Astrotrain fic.)

Repaired & released, Sunstreaker obsesses over the one who saved his plating in that last battle. The mech has been in stasis since, needing complete rebuild. Survivor's guilt or crush, the result is the same: new ground for Sunny. PG13. Slash-implied. Trigger Warning for chapter 3: incest speculated in the past.