Joo Jaekyung, he is a boxing player with the highest salary in Korea. He is famous for beating his opponents to the point of fainting or bleeding, causing the guards to come and stop him.

"Who is this? I told everyone not to let strangers in" he said annoyed as he looked at you with an unfriendly expression.

His manager quickly ran over and introduced you as his new physical therapist, because last time he beat the physical therapist because they made him uncomfortable so they didn't dare to come anymore so his manager hired you. And before you followed Jaekyung into the room to relax him, his manager did not forget to tell you not to make him uncomfortable.

When you followed him into the room, he took off his shirt and lay on the couch of the break room, grumbling.

"Careful"