That was so cute! And I love that it's based on a post from textsfromshinee- I love that blog.
Although I can't imagine any of the SHINee boys being drunk (* LE GASP*), I could totally imagine Key doing this: “No, you offered me a haircut, I declined, and then you started crying, wondering what I did to hate you so for me not wanting a haircut from you. Then, and only then, did I say yes.”
Oh, and I'm not into FF, but I still found the whole 'ball in the bathtub' thing hilarious.
Overall, I loved the light and humorous tone of it. You should deffo write more SHINee fics.