Plus points for changing things up. But minus points for stereotyping Hiccup to have glasses and being a "Nerd".

Oh my god. You made my day, seriously.
Okay, so feedback/encouragement *cough* praise *cough*:
I loved all of the chats, it really reminded me what kind of character everyone had. Also, I'm pretty sure this was a wrapping up chapter, but it seriously flowed really well; like, one event led to another and so on. By the end of the chapter, I could really see where and how this was going. The few flaws (from my perspective) is just about the characteristics of hiccup and Stoic, I feel like the big argument in HTTYD never happened and that both would be more stubborn - but, considering this is your AU, and an AU where the descision doesn't risk thousands of Vikings- I can also see how this might happen.

Emotionally... I just had a really, really bad day; no particular reason, but I felt more depressed then I have in a while, and your chapter helped me cope. I don't know how I can say this, but... thanks. Seriously, major thanks.

I love this story and I've been calling it for a while now and I'm so excited to read the next and final chapter :3

Not related to the story, but do you believe that Ash and Misty were meant to be together forever?

Can't wait for chapter 19 :D

I love the idea of Anna thinking that Hiro is adorable. She's such a darling. :)

HICCUP X MERIDA FOREVER!. Anyone?

I knew that this fanfic would be one of the greats. Fantastic chapter.

Seriously, why didn't this work?! I've been trying for weeks now, I swear!

Anyway, I found Anna's outburst and line of thought to be very convincing, as well as Kristoff's protectiveness. I also really like the fact that you had none or only a few grammatical errors, as I find they somewhat hinder the reader. Nice touch on IceBreaker as well! Delicate, unlike some of the other rather forced crossovers.

To improve... Wow. This is hard. But maybe... Include more charectors? Like, I know you mentioned them, but they kinda stayed in the shadow (Wilbur, Violet, Hiro, Astro, Thomas and Prim, Gogo, Honey Lemon [although I can understand why you didn't add much on them.],) and was Ralph's cousin invited (or was she too young)?

Odds are is playing as I type this. I think that song basically fits the flirty, ship-sailing nature of this chapter. The rom-com tropes are well-implemented, and the chapter was spot on in terms of pacing and humor. Good Job!

Where the hell was Hiccup?!

Quote Hiro Hamada : You gave me a heart attack !

I knew as soon as I read the beginning of the first chapter it was going to be about Hiro and Tadashi !

I really thought you were going to kill him off!

Now here's a question were probably all wondering : Is Yokai going to be involved? You managed to include Gothel in this story - though it was only in a flashback - so is he involved?

The feels! Surprisingly, I think this story was more emotional for you keeping Tadashi alive. Much like the rest of the story, this episode reads like THAT episode of Seinfield. This is a much more sober episode than normal, but it keeps everyone in character and still has some funny moments.

Yay! Another great chapter!

#TADASHILIVES

KUTGW!