Actually I'm a little bit confuse whether put this on crossover or regular, because even though the background case from Ranma, all of the characters are from Detective Conan.

Disclaimer: Detective Conan or Ranma is not mine.

Detective Conan ½

One day, Detective Kogoro got a letter of request from a client.

Dear Mr. Kogoro Mouri.

I heard that you are a great detective, and often proves supernatural thing through logic and real evidence. So I really need your help. Last week my six year old little brother is missing after take a bath, and suddenly a mysterious chicken appeared in the bathroom where my brother was lost. This chicken often came inside my brother's bedroom, it also went to bathroom if it want to pee. It was strange, wasn't it? We already called the police but they still couldn't find my brother. My mother believes that the chicken is my brother's transformation, she really cares toward that chicken. Of course it's impossible. Please help me, I already inserted my address and the map since it was difficult to reach. Only you my last hope. Thank you.

-Takura-

"Human turned into chicken? Huh, ancient thinking." said Conan from Kogoro's back, apparently he also read Kogoro letter.

"Hey you!" cried Kogoro, and Conan ended up with big bump on his head.

"Don't be too hard on him dad, he's still a kid" said Ran.

"Ya ya, now pack your thing kids, we have to go to a client. There's a case wait to be solved by this Great Kogoro! Hahahahaha!"

'Ugh, it's hurt. It seems that I choose the wrong detective. If not because of Ran, I believe that I won't survive living with this detective. Just see Kogoro, today I will use my ball to make you fainted'

Kogoro rented a car and all of them went to Takura's house. Takura's house was located in Jusenkyo, an isolated region with mountain geographical area. It was high and steep cliff. There were lots of gorges, also river with strong current and big rocks. The way to there was very difficult. Kogoro's car almost fell from the cliff for several times.

"Aaargh, why did people build house in a place like this!" grumped Kogoro.

Moreover the house was in the highest cliff.

After long and hard journey, finally they arrived at Takura's house, which is the only house there. They saw a Japanese traditional house, isolated from outside world, but was so peace. When they turned their body, they were amazed by the beautiful view. The cliff magically form beautiful pattern together with the river, the weather was also so cool and there was also a spring in front of the house. This house was perfect for someone who wants to relieve from the crowded city and seek for serenity.

"Excuse, may I help you?" asked a teenage man, about Ran age. Ran felt something different when she saw this man.

"I'm looking for my client, Takura, his house should be here"

"Ooh, I'm Takura. You must be that great detective Kogoro. Please come in"

Kogoro, Ran, and Conan entered the room. When they entered the house, they felt like they were brought to the Japanese old time. All of the furniture was old style, but still in good condition.

"This house was made long time ago by a man who want to be far from another people. After the owner die, his child want to sell this house. But because it was so isolated and difficult to reach, no one wanted to buy it until our family bought it for a really cheap price. We have a farm behind the house to plant our food, we're vegetarian. Oh, the owner also said that the spring here is a cursed spring. Please stay away from it unless something bad will happen to you"

"But you didn't tell us about that cursed spring in your letter" cried Ran in fear.

"I think we will be saved as long as we didn't touch it" replied Takura.

"Cursed! Cursed! The spring is cursed! Look! Tokiro has changed into a chicken!" cried a short and thin woman. Ran was afraid toward her.

"Mother, please come inside, look I bring a detective here, he will solve the problem and bring Tokiro back" explained Takura.

"I'm sorry, she's my mother. She felt depressed since Tokiro was missing. That's why I really need your help"

"Oh, don't worry Takura, I will solve this as soon as possible with my skill!" said Kogoro optimistically.

Kogoro Mouri then started looking around the house and Conan started his own investigation. First, he entered victim's room. He checked victim's private things, her wallet was still there. He also saw a lot of Yaiba cards there, even many of them are rare and legendary cards.

'Hmm, a kid who really love Yaiba card won't leave their Yaiba card if they're running away from home, so it's not running from home. There's also no any blackmail after a week, so it's not kidnapping for money. Victim's family said that they don't have any enemy, but that's only what they think and there's still chance of people who hate them secretly. But the best probability, by seeing it's geographical area, probably that boy was fall from the cliff into that river when playing alone, his body then brought by the stream, either stuck somewhere the police couldn't see or saved by someone. If he was saved by someone, probably he got amnesia because his head hit the rock in the river, so it's difficult to find his family even though already a week, or worse, he saved by a couple without child, and they said to him that they were his parents. But those just still probabilities, I still couldn't get the real evidence. Maybe I should wait a week more. Hey, I still not investigate the spring yet."

Conan ran to the spring. He squat on the spring's edge. Suddenly he was pushed from behind by someone. Byur! He fell in to the spring, fortunately he could swim and saved, just his clothes became wet. The person already ran away and Conan didn't see it, but by feeling his hand and the degrees when push him, it must be Takuma's mother which is short and had small hand. Maybe she's upset because her son which is in the same age as Conan was falling into the spring before missing, beside that she also believed that the spring was cursed.

Quickly Conan went inside to change his clothes.

"Conan, what are you doing? Why are your clothes wet?" asked Ran in worried when he saw the wet Conan.

"I got slip and fell to the spring, but don't worry Ran-neechan, I'm okay" answered Conan.

"Better now you take a bath and change your clothes, I will prepare for the dinner"

Conan then took a bath. When he wanted to wear his clothes, he was shocked when he saw his hand. Quickly he looked at the mirror. He almost fainted when he saw his own reflection in the mirror. . . He saw a naked teen with long and straight brown hair, blue eyes and pearl white skin. He looked behind but there was no one there, only him alone in that bedroom. No, it can't be! He then touched his body to make sure that it was real. He has turned into a teenage girl! The same age about Ran, but really beautiful, he never saw a girl as beautiful as this, he got astonished for a few seconds by his own reflection on the mirror, until he realized what happen.

'Noooooo! At first I transform into little boy, now I transformed again into beautiful teenage girl?! How will my future be? Conan suddenly missing and a beautiful girl appeared. How will my life in Kogoro detective agency? Well, Kogoro might be so happy to seeing me in this beautiful girl form, but how about Ran? Ran! How about my relationship with her? I'm afraid that she won't accept me to her house because she thought that I want to pursue Kogoro, and Kogoro even could propose me, euwh. It also will be much more difficult to do sleeping Kogoro trick, because my beauty look will attract so much people to looking at me. Or I change the trick to become a beauty and clever detective? I could be so famous and rich, but I don't want be far from Ran'

Conan then remembered Takura's word about the cursed spring, and the boy who rumored to transform to a chicken after fell to the spring then take a bath. Could that myth be true? He didn't want to believe it but he experienced it by himself. Maybe Takura's mother already knew about that thing, that's why she pushed him to the spring to revenge his kid. But still, he can't explain that supernatural and illogical analysis to anyone, beside that no one will believe him. And why the children became chicken while he became a girl?

'Well, actually there's a more important thing other than that. My future could be thought later, but how do I get out from here? I can't wear Conan's clothes and the towel is not enough to cover my whole body. Should I sneak out, naked? But there's no other choice!'

Conan in girl form peek from the bathroom, after checking that the condition was secure and everyone is in the living room, he ran quickly to Ran's room. Brukk! Suddenly he hit against Takura.

'Ups, this is bad' Conan quickly shut Takura's mouth before he shout.

"Who, who are you? Why are you naked in my house?" asked Takura, his cheek was red.

"Sstt, I just pass by when a man attack me, he steal all my belonging and want to rape me, fortunately I could ran until here. Can I ask for some clothes please? But please don't tell anyone. I'm so embarrassed"

"O, okay"

Takura then stole her mother blouse and skirt and give it to Conan. To Conan new form which has big boobs and is much taller than Takura's mother, the blouse became sexy blouse since the two upper buttons can't be buttoned and the skirt became mini skirt. He was disgusted with his new style which he thought looked like Sonoko.

"Could I know your name, please?" asked Takura.

"Em, ng…" Conan was thinking.

"Irene! Irene Edogawa" he just remembered the name Irene Adler, female character in Sherlock Holmes novel. He then realized that he have to go soon.

"Thank you so much, I will never forget you for your kindness. I have to go now, bye"

"Hey, don't you afraid with that man? Who now he's still outside waiting for you" but Conan already lost.

'Hmm, Irene Edogawa, she's so beautiful, I have to meet her again one day.'

Conan ran deep into the dark forest, his fear of his identity defeated the scariness of the environment. He then called Ran using Conan's voice.

"Ran-neechan, I'm sorry, suddenly I met Prof. Agasa and little detective group who wanted to go home after camping near here. I don't like to be here, so I go home with them. Don't worry me, bye"

'Fyuh, problem with Ran is temporarily solved. Now what should I do with this girl form?"