ㅐㅔ[ㅑㅐㅔ[ㅑㅐㅔ[ㅑㅐ
DKF wonders what all that was about?
RS: An obvious drive-by scribble, most probably from Korea. The characters, except for the brackets, are jamo, Korean letters, from which hangul syllable signs are built. The H-like structure is an A-I ligature, typically transliterated ae as in Daejon.