Cortis Seonghyeon, who makes hearts flutter

Cortis Seonghyeon, whose visuals are seriously no joke

Seonghyeon uploaded photos he took backstage at the Korea University festival to Instagram.

True to his name, Red Red Cortis, the red outfit suits Seonghyeon perfectly.

Uhm Sung-hyun's visuals that will make many older sisters cry🖤