Carol (5th grade elementary school) likes Kotarou (25), the guy who live in her house,
but she is aware of herself who has limitations,
she realized that she, who was still a child, would not be able to win Kotarou's heart,
things got worse, when she found out that Kotarou was dating her friend's sister, Chizuru,
she cried, knowing that she was not commensurate with her friend's sister, who was tall, had plump breasts, and was an adult,
that night, she wrote in her diary "I want to be an adult" in lines,
until what she wants is carried away in her dream,
when she's awake, there is a strange woman in front of her,
she claimed that she was named AI who was also the daughter of Carol and Kotarou who had come from the future,

this is a story, where AI will help Carol (mama) to unite with Kotarou (father).

Spin off of the popular light novel, follows in 4 koma version the spats between the honor student Kidou Eita, his "handsome girlfriend" Natsukawa Masuzu and his "hyper active" childhood friend Harusaki Chiwa.

Rather than "a story" placed on a continuity, it's a bunch of 4' skits and jokes using the well known characters.

A spin off based on Ai's usual antics of "trying to get closer to Ta-kun" from even before affiliating herself with the Jien Otsu club.

The story sets one month after Eita and Masuzu start dating, and sets itself on a "what if" scenario where the Harem element is stronger than in the original.

Eita enters high school aiming for the National University School of Medicine. Because of his parents' divorce--and his goal--he shuns anything to do with romance or love. One day Masuzu, the school beauty with the silver hair, who's just returned to the country, enters his life in a most unexpected way. Chiwa, his childhood friend since elementary school, will not let this go without a fight.