It didn't happen until they were home, safely ensconced in their ultra high security estate.
They had barely got in and locked the door when Hiruma pulled Sena to him, burrowing his face into the retired running back's shoulders, and broke out into great heaving sobs of pain, anguish and frustration.
That no matter how much dirt he had in his Devil's Handbook, no matter how good with a gun or strategy or figuring out the perfect winning play; he still had not been able to save Jyuumonji.
Sena closed red eyes, clutching harder onto Hiruma, and also cried for their combined lover and unofficial husband of almost forty years.
Yip, in my little drabble series head-canon, Sena, Jyuumonji and Hiruma all got together.