One Step Closer [Lab Rats-Chaseo One-Shot]

"Our love goes beyond the bond of brothers. I'm afraid of it, but I know it's best to embrace it. I love you, Leo. I'm never going to leave you, and I never want anything to happen to separate us."

Or the one where Leo sneaks onto the mission set, almost dies, and Chase is scared to lose his boyfriend. And then they're hard pressed to tell the rest of the family about them.