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 (Unicode page 31), from which hangul syllable signs are built. The H-like structure is an A-I ligature (ㅏ + ㅣ = ㅐ), typically transliterated ae as in Daejon 대전.