*dies of a heart attack*

[You]
...she's so adorable. What do I say?

[A]"Hello Miku-chan. It's nice to meet you. I'll be your guardian for the next few years."
"Ah, is that so. Make me a sandwich."
[C]"Those clothes look too big, let's change your outfit. Also, call me Onii-chan."
[D]"But I ordered Haku!"

Chun, I would only play that game based on the dialogue options you just listed.

Chun said:
[You]
...she's so adorable. What do I say?

[A]"Hello Miku-chan. It's nice to meet you. I'll be your guardian for the next few years."
"Ah, is that so. Make me a sandwich."
[C]"Those clothes look too big, let's change your outfit. Also, call me Onii-chan."
[D]"But I ordered Haku!"

[A] definately!

Chun said:
[You]
...she's so adorable. What do I say?

[A]"Hello Miku-chan. It's nice to meet you. I'll be your guardian for the next few years."
"Ah, is that so. Make me a sandwich."
[C]"Those clothes look too big, let's change your outfit. Also, call me Onii-chan."
[D]"But I ordered Haku!"

i'd save then pick D just so i can see her reaction then reload the save and pick A

kanrin said:

i'd save then pick D just so i can see her reaction then reload the save and pick A

*pause*
...
GENIUS!