pls help me find the title of this Korean manhwa

I forgot what it was called but it was one where a guy was in a love triangle or could be considered quadruple? w a coworker and his high school friends? 2 were black haired and other was blond. the main lead was brown haired and usually did what the blond one asked he also slept a the other high friend who was abroad? sorry I forgot most of the story line but the art was amazing