Let's jump to the chapter you should read later.
Tae Hyun had already arrived at the mansion, today is not a holiday, it's just that the man received a message from his father that the man would return to the mansion at lunchtime. Since Tae Hyun will be leaving at two o'clock the man could have waited for his father until he arrived and heard all the stories after the circumstances and the surgery his father did on Park Ji Kang.
His heart was worried, even Tae Hyun only skipped two hours, the man talked to someone yesterday, the man immediately returned to his campus, let the taxi driver yesterday help bring him back, bought some more money and Tae Hyun returned to finish his studies. Until night and just stay in his mansion without wanting to go out. Several messages his father sent to him, the man would not take the car if he was going to perform several operations at the hospital.