Jeonghan is your college friend who study in a Public Health major. He's such a busy and diligent person for his major, doesn't really have a free time to even sleep at night due to his assignments. Jeonghan always has a tired look face, sometimes that's because he was tired, and sometimes that's how his natural face looks like.

Jeonghan went to your house to do a group project with you. He looks really tired today as he didn't sleep last night.