Short's

Geryu could tell something was wrong, he didn't even need to ask what it was. His Captain was stressed. The upcoming battle must've been the reason why. All the planning he's been making, looking over the work everyone was putting in to make sure it was perfect. Everyone was excited, but the nerves with planning has always been stressfull. He was going to try his best to help his Captain Boros relax. Too much stress would be bad for his Captain.
So here he was, inside the throne room, waiting patiently waiting for everyone else to leave. It seemed today was the best day, Boros looked especially stressed this day, it was no wonder Boros had agreed so easily to his offer.
"Gerie," Boros greeted with a smile after the last worker had left. "Come," Geryu hurried over beside his captain, tentacles making their way to the cyclops' shoulders. 
Boros went to complain about what had him so stressed, Geryu making work of his tense shoulders, working his way down as each muscle relaxed. Boros hummed as a tentacle made its way under his baggy pants, wrapping around his member and moving in a slow motion, making sure to glide acrossed the grooves on the underside, making Boros shiver. They weren't strangers with this kind of thing.
After a few minutes the pace quickened, Boros grabbing Geryu's head and pulling him close, licking along his neck to his chin, sneaking a hand along a certain hidden tentacle. Geryu's movements hiccupped, but quickly recovered, the two's movements equally paced, Boros' and Geryu's breaths loud in the empty room.
They finally both came in union, Geryu's tentacle coated in translucent blue. Boros hummed with a smile, quickly pulling Geryu onto the throne with him, the two staying there for a few more hours to bask in the silence until they had to go back to work.