the extra from which book? I bought vol 1 and 2 but don't remember the extra (〜 ̄△ ̄)〜
Special edition of each volume. More expensive though.
Huh? Are there different print out? With extras? Σ(  ̄□ ̄||)
As in when you purchase the special (or limited) editions, the manga volumes come with booklets containing those extras.
Nope. Unfortunately there's no limited edition in my local bookstore. Maybe I should look it up online to purchase it (if it available)
the extra from which book?
I bought vol 1 and 2 but don't remember the extra (〜 ̄△ ̄)〜