1x1 - Suddenly 4 People in the Family?!

March 28, 2000

Miyu Kōzuki's parents had moved to the United States to work for NASA. Miyu has been told she is to live with her parents' old friend. She arrives, and it turns out to be a Buddhist temple. She meets her parents' friend, the temple monk, Hoshou Saionji, and his teenaged son, Kanata. The monk soon leaves for India for religious training, leaving Miyu behind with Kanata. Shortly after, a UFO flies into the house, and inside were an alien baby called Ruu and a "sitter-pet" called Wanya. They all then decide to live in the temple together. Kanata peeps at Miyu while she's showering, just as Miyu has seen him changing.

1x2 - Ruu-kun is Climbing the Chimney

April 4, 2000

It was Miyu's first day at her new school. She finds out that Kanata has a fan club, and he is the class president. Miyu meets Christine Hanakomachi, a half-French girl who fancies Kanata. During class, Miyu spots Ruu flying outside. Kanata and Miyu chase after Ruu. Ruu ends up climbing a chimney, forcing Kanata and Miyu to climb it too.

1x3 - Chris Drops By

April 11, 2000

Chris and her friends came by Kanata's house to have a welcome party for Miyu. But their home turned out to be a disaster. They needed to take down floating items and hide Ruu and Wanya from their guests. Chris misunderstands Miyu and Kanata's relationship, after they discover Ruu.

1x4 - Momoka and the Necklace

April 18, 2000

Kanata and Miyu both go out with their friends. Before Miyu leaves, she notices that her necklace is missing. A crow has taken it. But 3 year-old Momoka chases the crow away and retrieves the necklace. While shopping for dinner, Wanya loses Ruu. Ruu finds Momoka with the necklace. They both are together, when finally Kanata and Miyu find Momoka and Ruu. Momoka starts referring to Ruu as her boyfriend.

1x5 - Miyu's Awful Cuisine

April 25, 2000

1x6 - Mama Comes Over on Mother's Day

May 16, 2000

1x7 - Ruu-kun, Popular at School

May 23, 2000

1x8 - Ruu-kun's Acting Debut

May 30, 2000

1x9 - A Date in the Park Between Cousins

June 6, 2000

1x10 - Playing with Spaced-Out Santa

June 13, 2000

1x11 - June, on Father's Day ... Papa Comes

June 20, 2000

1x12 - The Mysterious Boy, Yaboshi Seiya

June 27, 2000

1x13 - The Mysterious Planet Sharaku

July 11, 2000

1x14 - Help! Transforming Wanya

July 18, 2000

1x15 - Mikan Ran Away, Saionji!

July 25, 2000

1x16 - Ocean and the Lovers' Tree

September 5, 2000

1x17 - India's treasure is SAIONJI?

September 12, 2000

1x18 - Momoka's Passport

September 19, 2000

1x19 - The Mysterious Home is Miyu's Real House?

September 26, 2000

1x20 - The Off-season Home Visit

October 3, 2000

1x21 - Principal, Monkichi Reunite

October 10, 2000

1x22 - The Hike of Fear

October 17, 2000

1x23 - Everyone, Gather at Saionji's

October 24, 2000

1x24 - The Blackout Halloween

October 31, 2000

1x25 - Ruu-kun and the Department Store

November 7, 2000

1x26 - Yaboshi Saiya's Warning

November 14, 2000

1x27 - A Correspondence with Ruu's Parents

November 21, 2000

1x28 - Sister Comes to Saionji

November 28, 2000

1x29 - Nanami and the Mysterious Tsukemonoishi

December 12, 2000

1x30 - Wanya Wanya

December 19, 2000

1x31 - The First Christmas with Saionji

January 9, 2001

1x32 - Chris, Ski, Mansion

January 16, 2001

1x33 - Kanata's Childhood Friend

January 23, 2001

1x34 - Kanata's Promised Date

January 30, 2001

1x35 - Bye Bye Wanya

February 6, 2001

1x36 - The Heiomachi Onsen Excursion

February 13, 2001

1x37 - Miyu's Idol Debut

February 20, 2001

1x38 - Ruu-kun Has Multiplied

February 27, 2001

1x39 - All 100 Ruu-kuns, Gather!

March 6, 2001

1x40 - Kanata's Rival Appears?

April 10, 2001

1x41 - Kanata and Nozomu's Showdown

April 17, 2001

1x42 - Where is Okame-chan?

April 24, 2001

1x43 - The Family Assembles at Saionji

May 1, 2001

1x44 - Koinobori Aren't Scary!

May 8, 2001

1x45 - Cinderella Inside the Book

May 22, 2001

1x46 - Chris and the White Whale

May 29, 2001

1x47 - Miyu and Mini-Miyu Go to School

June 5, 2001

1x48 - Santa and Kanata's Weird Pot

June 12, 2001

1x49 - Mizuno-sensei's Mysterious Trip

June 19, 2001

1x50 - Stop it, Lazy Wanya

June 26, 2001

1x51 - Mika-san's Mysterious Promise

July 3, 2001

1x52 - Saionji's Ghost stories and the Mysterious Koishi Stones

July 17, 2001

1x53 - Miyu and Kanata Go to America

July 24, 2001

1x54 - Everyone but Santa goes to America

July 31, 2001

1x55 - The Weird Object That Seiya Left Behind

September 4, 2001

1x56 - Mecha Wanya Attacks!

September 11, 2001

1x57 - Nozomu and His World of Dream

September 18, 2001

1x58 - Our Pet is Number One

September 25, 2001

1x59 - Peppo, Ruu, and Wanya

October 2, 2001

1x60 - Mikan's Work Place is the Saionji

October 9, 2001

1x61 - Miyu and Kanata's First Kiss

October 16, 2001

1x62 - Nagging at the Saionji Temple

October 23, 2001

1x63 - Spooky Mountain Villa

October 30, 2001

1x64 - Meeting a Penpal

November 6, 2001

1x65 - Inventions are so Boring

November 13, 2001

1x66 - A Friend, a Rival, a Competitor

November 27, 2001

1x67 - Teru Arrives From Planet

December 4, 2001

1x68 - Bowmeow Versus Mister

December 11, 2001

1x69 - Ousted Guava Falls in Love

December 18, 2001

1x70 - Momoka’s Christmas

December 25, 2001

1x71 - The Seven Gods of Fortune

January 8, 2002

1x72 - The Same Kimono as Miyu

January 15, 2002

1x73 - Miyu and Little Boy Kanata

January 22, 2002

1x74 - Goodbye Evil Gang

January 29, 2002

1x75 - Valentine’s Day in Heiomachi

February 5, 2002

1x76 - Ruu in the Lead Role at the Cultural Festival

February 12, 2002

1x77 - On the Night of the Full Moon

February 19, 2002

1x78 - See You Again

February 26, 2002

Mika Kanai

Ruu ,Mikan Yamamura (voice), Ruu (voice)

Kaori Nazuka

Miyu Kouzuki (voice)

Yuko Sanpei

Kanata Saionji (voice)

Chiemi Chiba

Wannyaa (voice)

Junpei Takiguchi

Professor Vincent (voice)

Yuko Minaguchi

Miki Kouzuki (voice)

Hikaru Tokita

Santa Kurosu (voice)

Atsuko Enomoto

Aya Konishi (voice)

Haruna Ikezawa

Christine Hanakomachi (voice)

Chinami Nishimura

Momoka Hanakomachi ,Jewel Alien (voice), Momoka Hanakomachi (voice)

Katsuyo Endou

Mizuno (voice)

Shirakura Asako

Nanami Tenchi, Nanami Tenchi (voice)

Taisuke Yamamoto

Nozomu Hikarigaoka (voice)

Asami Sanada

Seiya Yaboshi (voice)

Chihiro Suzuki

Mizuki Yamamura (voice)

Junko Noda

Rui Yaboshi (voice)

Kenichi Ogata

Houshou Saionji (voice)

Kunihiko Yasui

Shikada (voice)

Takuma Suzuki

Yuu Kouzuki (voice)

Ai Tokunaga

Peppo (voice)

Yuki Matsuzawa

Shiori (voice)

Hisayo Mochizuki

Durian (voice)

Hitoshi Takagi

Old Wannyā (voice)

Kazusa Murai

Yukari (voice)

Kotono Mitsuishi

Akira Kizyo (voice)

Mika Kawamura

Piki Piki Angel (voice)

Miki Nagasawa

Guava (voice)

Naoki Bando

Principal (voice)

Orine Fukushima

Kabokichi (voice)

Ryotaro Okiayu

Teru (voice)

Sakiko Tamagawa

Hitomi Saionji (voice)

Yuko Goto

Sayuri (voice)

Yuko Kato

Nursing teacher (voice)

Yumi Takada

Koharu Yumenokouji (voice)

Yuri Shiratori

Koume Yumenokoji (voice)

Yuriko Yamaguchi

Minami's mother (voice)