Just because he is a host doesn't mean he sleeps with his clients. There are different types of host.
Well Akira works at the shop of the father of his lover to begin with, then he lives with his boss and his lover. Hazumi accept's the fact that Akira is a host and that it is his work, nothing more that a role that he plays according to his clients request and that's what Akira is telling Hazumi in his explanation that everything is a fantasy. Later Hazumi actually states that he fell in love with the man (reality) he is and not the work he do...
Turned off by slut host character. Like seriously, how can that school kid be with a man who sleeps around like that. The man should quit being a host then, it's disgusting.