Haruki is apart of Class 1-D. He is apart of the three idiots of Class D along with Ike and Sudou. He has a tendency to lie and his grades are the lowest in the class. Similar to his friends, Haruki has a perverted side who is attracted to Kikyō Kushida as he was willing to peep on the girls. He is also very attracted to Airi Sakura and Haruka Hasebe, mainly for their well-endowed bodies and quiet nature.
