The year is 220X. Technology has advanced rapidly since the age of the internet, leading to the creation of new and more efficient modes of transportation, as well as the construction of futuristic cities, all linked together by three satellites orbiting the Earth—Pegasus, Leo, and Dragon. The satellites accomplish this by maintaining a network of EM waves around the planet's atmosphere, thereby powering the invisible EM Wave World. The human population carries portable devices called Transers to interface with the EM Wave World and other electronic devices. Problems caused by criminals and EM Wave Viruses manipulating the EM Wave World are commonly dealt with by the Satella Police.
A 5 year old Yuzuyu is left behind by her mother and now must live with her relatives. The eldest son, Kippei is appointed to watch over little Yuzuyu. Being popular with girls, his life changes drastically as he realizes his days become ever so busy with making lunches, walking Yuzuyu to the kindergarten, playing with her and even listening to her problems while Yuzuyu awaits for her mother's return.
Basically, Iori is on a shoot for the holiday so Ichitaka teams along. Then he finds out that's where Itsuki and his friend used to play. Lots of crap happens and Ichitake and Iori become closer.
Ichitaka's Delusion Diary are some bonus "episodes" containing his "fantasies" about the girls he meets.
One episode short series of the Ape Escape anime.
The story's main character is 16-year-old high school student Ichitaka Seto who is in love with his classmate Iori Yoshizuki, but too shy to tell her. Again and again he plans to tell her his true feelings, but each time something (usually a misunderstanding of some kind) gets in the way. Things become even more complicated when Itsuki Akiba, a girl Ichitaka was friends with in their childhood before she moved to the United States and who had a huge crush on him, returns to Japan.