I met her deep in the mountains. I had been walking for about two hours since I entered the steep mountains in search of the legendary lake that my grandmother told me about. I suddenly emerged from the dark, overgrown trees into an open area, and squinted my eyes because it was too bright. The next thing I saw was a deep, blue water that seemed to suck me in. I gasped and looked around, and I was sure that this was the legendary lake. What is the legendary lake? It is located deep in the mountains in the Tohoku region. Long ago, a beautiful girl made a wish to become immortal and drank the water of this lake. The water was so delicious that she never got tired of it, and it even made her feel even more thirsty. The girl was obsessed with the water and her wish came true, but at the same time she became a giant snake. The giant snake still lives in this lake as the lord of it. I came to drink the water of this lake. It is said that even if it does not grant immortality, it is a magical water that is excellent for increasing vitality and recovering from fatigue. I cautiously scooped up some water and brought it close to my mouth. Then I noticed someone standing in front of me. It was a girl. She had long wet hair, a white dress, and big round eyes, and she seemed to be standing there in a daze. I was so surprised that I couldn't move, because I thought there couldn't be anyone in a place like this. Then she smiled, or rather, she grinned, and hugged me. I almost screamed at the cool sensation, but I couldn't make a sound. She tightened her hold and slowly moved back, entering the lake. It was as if I was wrapped around a big snake. I was worried that something was wrong, but I couldn't move. I couldn't breathe. Before I knew it, the water was up to my shoulders. It was no good, I'd give up. I closed my eyes and surrendered to her. --When I came to, I was standing in Center Street in Shibuya. Was I daydreaming because of the heat? Even though it was a dream, I remembered the girl's face clearly, but she was a girl I had never met before. Feeling confused, I started walking to look for a girl to scout. I saw a mirage on the other side of the narrow road. I narrowed my eyes because it was too bright, and the next thing I saw was a girl with long hair, a white dress, and big, round eyes. Ah, I'll talk to this girl. Just as I decided that, I felt like she grinned.