** Spoiler Alert!!! click to hide or show**
Did you seriously believe that's it? >=D
Though he appears to others as extremely considerate and kind, Yunoki Azuma actually has a darker side to him that he never shows to everyone. This darker side of him is more intimidating and can be perceived cruel, a result of his oppresed upbringing as the third son of the Yunoki clan. Later, he showed his other side to our heroine, Hino Kahoko, and much later to his own best friend, Hihara Kazuki (only happens in the game and perhaps will happen in the anime if the series get a second season).
He considers Kahoko his 'sweet toy' and enjoys teasing her to help him rid of his boredom over life. Though he says that he didn't care for her, he is actually attracted to her and also 'subtly' takes part in the rivalry among the other concour participants to get Kahoko's attention.
He is also rivals with Kaji Aoi, a new student in Kahoko's class. He dislikes Kaji because the latter is more open about his feelings for Kahoko and because Kaji reprimands his obedience to his family. Hence the infamous fight scene in the game below..