Singer Sunmi (former Wonder Girls), she's thin but has volume! …why are her knees black?

Sunmi, a singer from the group "Wonder Girls", reported on the recent situation.

On the 15th, Sunmi released some photos taken in Cebu, Philippines.

Sunmi poses in a sleeveless mini dress. Sunmi looks at the camera with a seductive eye like a cat. It boasts an exceptional sense of volume even in a slim style.

Meanwhile, Sunmi's knees have turned black, making fans curious as to what happened.

Sunmi released a digital single "HEART BURN" in June last year. In addition, he is currently in charge of the SBS digital original content "Sunmi's Show! Interview".