"m_um_u" (who is also a user on Twitter) has been ++'ed 3 times and --'ed 0 times by a total of 3 people.
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Operation Sign, User and Reason
++'ed by sacon (けっこうつぼった)
Tweet: m_um_u++ けっこうつぼった
++'ed by bankogal
Tweet: m_um_u++
++'ed by TKR (おもろい)
Tweet: m_um_u++ おもろい