|Hair||Brown, Short, Spiky Bangs, Straight|
|Body||Pale, Slim, Teen|
|Clothes||Glasses, Necktie, School Uniform, Vest|
|Personality||Funny, Genius, Ore-sama, Womanizer|
|Role||Classmate, Friend, High School Student|
|Engages in||Time Travel|
|Engages in (Sexual)||Not Sexually Involved|
|Visual novels||Side character - Really? Really!|
Side character - Shuffle!
Side character - Shuffle! Love Rainbow
Side character - Tick! Tack!
|Voiced by||Koike Takezou|
Itsuki Midoriba is Rin's "bad" friend and classmate. He addresses himself as "oresama". Being the womanizer of the class, he is envious of the girls' attraction to Rin and often mentions that he will take care of the girls that he doesn't choose.