Translated, feel free to edit if it doesn't sound natural. Salmiakki-Aakkoset, "salty liquorice alphabet", is a type of candy. Someone who knows better could maybe add an explanation note.
"were you raised in a barrel?" Its an saying, used when someone doesnt seem to know about sometihng, that you yourself like to think as basic knowledge that everyone should have.
edit well, its not always barrel, some people like to say "did you live under a stone or something"
If someone manages to catch this guy as he uploads them you should suggest for him to make a pixiv and put all of his stuff there. It would be nice to see and follow his work
Flandre gets to visit Reimu.Your favorite color?Why is the sky blue?Like you and me.Geez, you ask so many questions. Were you raised in a barrel or something?Hey.Hey Reimu.Why not red?What're those tubes in your hair?Why do birds fly?I'm sorry! Let's go have some ice cream!Aaa!! I mean...!Do you like Salmiakki-Aakkoset? I do!
Salmiakki is a type of salty liquorice candy. They are usually diamond-shaped. Salmiakki-Aakkoset have alphabet letters on them.