I mean it makes sense that if a said person is in a relationship with a particular individual and they want to hook up without their families finding out then a hotel would be the most suited option.
This was even one of the most expensive hotels in Capital Star. Yi Chen's thoughts couldn't remain pure no matter how hard he tried. Dropping everything he left the academy to find him. He didn't even know what he would do when he finds him. All he could think about was getting there. As for what happens after it was yet to be seen.
Zi Han on the other hand had decided to take on his grandfather's offer and use the two-hour session booked for him.
If Yi Chen wasn't willing then why not pay a professional to do it for him, right? Sure he would feel uncomfortable at first having a stranger touching his body but strangers could become familiars in the future so why not give it a try?