Tsukishima didn't understand why, but due to his brother's rage he was bought by the Orihara's. Somehow he had gotten into all this, and was now forced to pay off his brother's debt. Some of those days he wondered why it was him, but he knew that Shizuka would have never been chosen, because Kanra had some strange form of crush on her. Delic wasn't in the city anymore so he was out of the choices. Shitsuo didn't even live in Japan, since he lived with Sakuraya in England. Tsugaru, he didn't even know why he wasn't picked. He wasn't clumsy; in fact he was graceful for a man of his stature. Tsuki was nearly the opposite, since he was so very clumsy, and got him in trouble and ended up cleaning glass a few times a day, getting tea glasses and little plates. The worst of it all, was that he was forced to wear a maid's outfit, of course it was Izaya who had him wear it.
Since he was now the unofficial slave to the Orihara's he was forced to do whatever they said. Hibiya treated him like a servant, making him wash him, and do everything that he just didn't want to do. Kanra really only made him cook, which he wasn't that bad at cooking so it wasn't too bad. Psyche had him spend time with him, so he was more of a friend to him, expect for when he wanted him to get something, which he would always do. Roppi really didn't have him do much, only treat his cuts and get him some food, so it was really only simple tasks. It was Izaya who was truly the worst. When his clients were there he had to serve them tea and snacks, and do what he was told, no matter how difficult the task was. Izaya even treated him like a sex slave at time, always finding ways to embarrass him, as much as he could. Izaya was a sadistic man after all, so it did make sense.
After a while of this, Roppi the one who never seemed to care about him, starting seeing the bruises on Tsuki and started to treat him a bit nicer, trying to keep him away from his older brother, who had become a giant dick towards the young Heiwajima. It almost seemed as if, Izaya thought that Tsuki was like Shizuo, and could take all the rough treatment, and keep his normal exterior, but Tsuki was much softer and easier to hurt then Shizuo. The treatment had started to hurt Tsukishima, more than Izaya knew, because he really only ever opened to Roppi, fearing of what Izaya might do to him next.