Red Velvet's Irene and Seulgi have revealed another shadow puppet teaser for 'Monster'.

Once again, Irene and Seulgi want you to "Guess who" when it comes to the shadow puppet in the clip below. The two Red Velvet members are making a unit debut with 'Monster' on July 6 KST.

Take a look at Irene and Seulgi's latest shadow teaser below and their previous ones here and here if you missed them!