It's mainly about the daily lives and relationships of a group of teenage boys. The story focuses on their friendships, emotions, and experiences growing up.
Reborn in the small days of Qingshui, did it refer to the small days in Qingshui or the life back in Qingshui after rebirth? If it's the former, then I can answer: Rebirth of the small days in the book of Qingshui can be found in the following examples:
Rebirth was similar to living a happy life as a child from a poor family in Shimizu. Through hard work and opportunities, he gradually grew into a useful person and lived a happy life.
There were also some common plots in the life of the reborn Qingshui novel, such as gaining good parents and teachers through intelligence, gaining opportunities to study hard and grow up, gaining the support of friends and classmates through hard work and kindness, and finally achieving success and happiness.
Rebirth in Qingshui City was similar to a broader concept. The specific plot and character creation could be determined according to the type of novel and the author's writing style.
The Kagerou Days Manga Story has a complex plot involving time loops, different characters' fates, and a mysterious world. It mainly follows the story of a group of teenagers with special abilities. There are conflicts, friendships, and lots of emotional drama.
I'm not sure specifically as I haven't read it. It could be about various things like the adventures of the characters during 340 days, or it might be a side plot that runs parallel to the main manga storyline for that period of time.