One of the bros challenges Noctis to not to jerk off for as long as he possibly can, possibly with taunting that he couldn't go without even a couple of days. Noctis holds up, but eventually needs "help" not coming via creative punishments when he feels like he's close to giving in. Feel free to use rings and other toys to keep Noctis in check. Bonus if Noctis still has to service the other bro with his mouth/ass but without coming.

Make it bros/Noctis, for all I care. Have no real preference for pairings here.