A manga about a worker who is a prostitute learning bout love

In the first story there was one guy ( Guy a) who was really in love with the male prostitute (Guy b) but in the end the prostitute ended up using him and breaking his heart thus Guy A was left heart broken
In the second story while still working at the same company (Guy b) Got caught Selling his body He was caught by Guy c
Then sometime later he fell in love with with guy c
The second story was about guy b and guy c being cute to eachother
The third story was about guy b giving up prostitution and confessing his love for guy c however
In the end it shows that guy c was already in love with someone else and that someone was the one who was in love with guy b the guy who was in live with him in the first story
So it ended with guy a and c happy together
While guy b coping with his loneliness
If anyone knows about this please send me a link