Hello is the first extended play by MAMAMOO, and is the group's debut extended play. The EP features the previously released singles Don't Be Happy, Peppermint Chocolate, and Heeheehaheho. Mr. Ambiguous is the title track of Hello.

Track list

  1. Hello
  2. Mr. Ambiguous (Mr. 애매모호)
  3. Heeheehaheho (히히하헤호) (with Geeks)
  4. Baton Touch
  5. I Do Me (내맘이야) (Hwasa Solo)
  6. Peppermint Chocolate (썸남썸녀) (with K.Will ft. Wheesung)
  7. Don't Be Happy (행복하지마) (with Bumkey)
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