Zongman, Who is Not Childhood Sweetheart

Starting in kindergarten, I met Yukinoshita, Hayasaka Ai, and the Kotori sisters... [Male protagonist, multiple female protagonists, daily story] Good news: I was killed by a dump truck, but I traveled through time. Bad news: I traveled through time as a five-year-old. —My name is Gen Chiye, and I'm currently in the last year of kindergarten. Although my body has shrunk, I'm not panicking at all. This is because my system has a "God's perspective." Under certain conditions, I can observe others, defying the laws of physics. Furthermore, I can bind to others. Any power-ups they gain through their hard work will be shared with me. Knowing this, the next step is simple... (This story blends the worldviews of several popular youth anime series, with detailed descriptions of each major character. Even those unfamiliar with the original works can easily read it as an original story.)