
I don't really think luffy is idiot for trusting way to lightly. Is it just me or I see luffy as someone who can tell if one is good or not, or he is just going along with his instinct lol

It's this one ( http://www.mangago.zone/read-manga/one_piece/mr/m_chapter-894/pg-4/) and the next page after that.
Dang love her already. Dear Goda, please make yamato a strawhats pls(▰˘◡˘▰)