Toxic relationships are not healthy for anyone as they have major consequences in your life from dependency to trust issues and yet we see a toxic relationship.
At first, I thought Tae Kyu was his younger brother as he seemed so needy and the way he treated Jae sung and wanted what he wanted not realising just how hard it is to get money and have to pay everyone. But maybe I thought wrong as he did state he had no friends or family to support him,

Yong Joon I was most sympathetic towards him as all his life he has faced hardships that seem that he isn't appreciated for as Tae kyu always wants more from him. This makes me understand why he does prostitution as it is the only reliable way to make money and he was so in conflict with himself as he knew his actions would have consequences.

The pacing at times were slow but overall it matched the plot