The main character, Ayase Yuuto is your average boy without any special traits. He attends a private high school where he is one of the many and doesn't stand out, until, one day, he happens to discover the secret of the school princess Nogizaka Haruka, and his life changes drastically from there on. Haruka, the school's most unattainable girl, is so idolized in the school for both, her looks and intelligence, that her classmates nickname her Nuit Étoile (The Silver Star of the Night) and Lumière du Clavier (The Shining Princess on the Piano). However, nobody knows that it is only a fake role she assumes to hide her true nature. In reality she is a die-hard fan of anime, manga, and otaku culture.

The series centers on Haruka's daughter, who aims to be an expert in Akihabara culture. The story follows her relationship with a male "casual." (Source: Anime News Network)

The main character, Ayase Yuuto is your average boy without any special traits. He attends a private high school where he is one of the many and doesn't stand out, until, one day, he happens to discover the secret of the school princess Nogizaka Haruka, and his life changes drastically from there on. Haruka, the school's most unattainable girl, is so idolized in the school for both, her looks and intelligence, that her classmates nickname her Nuit Étoile (The Silver Star of the Night) and Lumière du Clavier (The Shining Princess on the Piano). However, nobody knows that it is only a fake role she assumes to hide her true nature. In reality she is a die-hard fan of anime, manga, and otaku culture.

When I woke up, I had returned to my junior high school self—. I had become a worthless adult who had given up on my dreams. Even though I was popular with women, I was working a dead-end job with no money. I blamed everything wrong with my life on my time in junior high school, and in particular, on her — Akimiya Hazumi, my first love. As I was thinking about this, I got into an accident and found myself time-leaping back to junior high. Back then, I was a nondescript mob character, but now I can properly groom myself and unleash my adult social skills. Before I knew it, I was successfully living my ideal youth! Using my memories from the past, I saved the beautiful gal, Chigasaki, on my way to school, and helped to resolve the troubles among the popular boys and girls in my class. All that was left was to find out what really happened from “that summer” when the sunflowers were in full bloom — an incident involving Akimiya Hazumi, the root cause of the downfall in my life—. (Source: Dengeki Bunko translated)

The series centers on Haruka's daughter, who aims to be an expert in Akihabara culture. The story follows her relationship with a male "casual." (Source: Anime News Network)

Hiroshi Minakami is a high school student, living alone since his father left him to work overseas. He thinks he is not beloved by fortune these days. One day his old friend advises him that the key to recover luck is to help others suffering. He believes it, and saves an abused kitten, a lady collecting charity contribution and a dirty cherry tree, all of which bring results that his condition gets even worse. However, in the night, a pretty cat fairy, a beautiful nymphet of crane and a cute little goddess appear and whisper love to him. It is the beginning of an embarrassing tripartite love-comedy.

I'm going to marry my childhood friend. Kaori, who is eight years younger than me, is my childhood friend and neighbor. She is an angel who tells me that she will be my wife. She is more important to me than my own sister, having spent all of our childhood and adulthood together. I met Maika in kindergarten. She lives across the street. She is a cheerful girl with a mischievous sense of humor. She has been with me from elementary, junior high, high school, and university all the way to my working days, and she is a reliable childhood friend who helps me out whenever I get in trouble. Wahana helped me that time when I ran away from home when I was a child. She is a clumsy older-girl who has no life skills at all. She told me that when I grow up, if I am not married yet, she will....... It's been 1,000 days since we met. Three childhood friends. One bride. The one I will marry is.... (Source: Kadokawa, translated)