Heehee, this is brilliant. :D

Adorableness and Power are balanced perfectly.

Oh Fantastic crossover!

My word, not a single review on this?
Excellently written and perfect characterizations. I love Mycroft and Harry's interactions with each other, you've gotten their voices down pat. Loved Sherlock's brief cameo as well.

And now I'm laughing at Mycroft and Sherlock likely arguing who has the more badass boyfriend.

Great job, would love to see more!