Making this summer more glamorous than ever, SISTAR is preparing for a comeback! The girls have released two sets of beautiful individual teasers titling them as 'Accessory Riddle' and 'Eye Contact Riddle,' for their upcoming 4th mini album.

'Accessory Riddle' teaser images:

The members look amazing in these images. Everyone poses beautifully wearing exquisite heavy earrings which are highlighted on the images.

'Eye Contact Riddle' teaser images.

The members are gazing at you with their piercing eyes which seems to hide something that is yet to be told.

The title or the release date is still unknown. However, there seems to be a hint on their first teaser image which is a note. The note is wrinkled and stained with tears says, 'Don't worry about me. I just want you to disappear. For making me see you, I dislike God. But, I like you, I love you.'

The second teaser was with a similar note.