I'm looking for a specific manga about unrequited love but couldn't find it in my search.

The main character works as a secretary for the guy he is in love with. But that guy has no idea and is always sleeping around leaving the clean up to his suffering secretary.
When the promiscuous chief finally finds out about his secretary's love he is stricken with a sense of guilt...and begins to wonder about their relationship.

I hope that's enough info for you guys ^^

Thanks~

Too slow!
I've found it: Playboy Amour