Ape Looking up at the Starry Sky

By chance, I, who was just an ordinary sophomore, exchanged souls with a high school freshman from my alma mater. At first, I thought it was just a dream, but after waking up from the dream, I was surprised to find that I couldn't go back, and my original body was still my own consciousness. What on earth was going on? ? Knowing that the matter was irreversible, I decided to work hard to live with this person. As things developed, I gradually discovered that I was not the only one who had undergone soul exchange... What will be the future development...