There are additional chapters that give the "true ending". This ending is kind of a cop out because of Japan being more strict on Loli in general due in part to Tokyo being where the Olympics where to be held during the time. The true ending is well worth looking for to give closure to what actually happens by the end. I don't know if it was the best decision but my lord was I just so happy. It does beg the question as to who first noticed the pool to be an Interdimensional gate.