I know a lot of people don't like Hitomi, and yes, she is ANNOYING. But let's face it, she is doing a major favor for Shousuke, he probably will appreciate all the effort put into making him get next to other people and interact with them. Maybe they will fight about it, but without Hitomi there Shousuke was just a nice face, talented guy and a shitty personality. I speak this as an introverted, but Shousuke is an egoistic self-centered person who looks down on other people. Hitomi is there to show him that there is nothing wrong with interacting with others (even if it's against his will).