Sorry if my English bad, I looking this manga for hours and found nothing, The story is a boy student in school trip to history site, then he found a paper money, but the picture in the money is his face, then he get drown to river and get travel to edo age, This manga really funny, i want to read it again, The title is in Japanese, so i cant remember it, but the translation is 'boom, edo guy, or 'doom, edo boy', Any of you know what manga I talking about?