Happy birthday to BTOB's maknae Sungjae who has turned 21 (international age 20) as of May 2 KST!

Sungjae posted the above photo on�Twitter,�looking cute wearing a 'Pororo' party hat and holding a delicious-looking cake.�He's wearing a school uniform and his face is bandaged, showing that he is busy on the drama set even on his birthday.