Season 1
Episodes
1. Suddenly 4 People in the Family?!
2000-03-28
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.
2. Ruu-kun is Climbing the Chimney
2000-04-04
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.
3. Chris Drops By
2000-04-11
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.
4. Momoka and the Necklace
2000-04-18
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.
5. Miyu's Awful Cuisine
2000-04-25
No overview available.
6. Mama Comes Over on Mother's Day
2000-05-16
No overview available.
7. Ruu-kun, Popular at School
2000-05-23
No overview available.
8. Ruu-kun's Acting Debut
2000-05-30
No overview available.
9. A Date in the Park Between Cousins
2000-06-06
No overview available.
10. Playing with Spaced-Out Santa
2000-06-13
No overview available.
11. June, on Father's Day ... Papa Comes
2000-06-20
No overview available.
12. The Mysterious Boy, Yaboshi Seiya
2000-06-27
No overview available.
13. The Mysterious Planet Sharaku
2000-07-11
No overview available.
14. Help! Transforming Wanya
2000-07-18
No overview available.
15. Mikan Ran Away, Saionji!
2000-07-25
No overview available.
16. Ocean and the Lovers' Tree
2000-09-05
No overview available.
17. India's treasure is SAIONJI?
2000-09-12
No overview available.
18. Momoka's Passport
2000-09-19
No overview available.
19. The Mysterious Home is Miyu's Real House?
2000-09-26
No overview available.
20. The Off-season Home Visit
2000-10-03
No overview available.
21. Principal, Monkichi Reunite
2000-10-10
No overview available.
22. The Hike of Fear
2000-10-17
No overview available.
23. Everyone, Gather at Saionji's
2000-10-24
No overview available.
24. The Blackout Halloween
2000-10-31
No overview available.
25. Ruu-kun and the Department Store
2000-11-07
No overview available.
26. Yaboshi Saiya's Warning
2000-11-14
No overview available.
27. A Correspondence with Ruu's Parents
2000-11-21
No overview available.
28. Sister Comes to Saionji
2000-11-28
No overview available.
29. Nanami and the Mysterious Tsukemonoishi
2000-12-12
No overview available.
30. Wanya Wanya
2000-12-19
No overview available.
31. The First Christmas with Saionji
2001-01-09
No overview available.
32. Chris, Ski, Mansion
2001-01-16
No overview available.
33. Kanata's Childhood Friend
2001-01-23
No overview available.
34. Kanata's Promised Date
2001-01-30
No overview available.
35. Bye Bye Wanya
2001-02-06
No overview available.
36. The Heiomachi Onsen Excursion
2001-02-13
No overview available.
37. Miyu's Idol Debut
2001-02-20
No overview available.
38. Ruu-kun Has Multiplied
2001-02-27
No overview available.
39. All 100 Ruu-kuns, Gather!
2001-03-06
No overview available.
40. Kanata's Rival Appears?
2001-04-10
No overview available.
41. Kanata and Nozomu's Showdown
2001-04-17
No overview available.
42. Where is Okame-chan?
2001-04-24
No overview available.
43. The Family Assembles at Saionji
2001-05-01
No overview available.
44. Koinobori Aren't Scary!
2001-05-08
No overview available.
45. Cinderella Inside the Book
2001-05-22
No overview available.
46. Chris and the White Whale
2001-05-29
No overview available.
47. Miyu and Mini-Miyu Go to School
2001-06-05
No overview available.
48. Santa and Kanata's Weird Pot
2001-06-12
No overview available.
49. Mizuno-sensei's Mysterious Trip
2001-06-19
No overview available.
50. Stop it, Lazy Wanya
2001-06-26
No overview available.
51. Mika-san's Mysterious Promise
2001-07-03
No overview available.
52. Saionji's Ghost stories and the Mysterious Koishi Stones
2001-07-17
No overview available.
53. Miyu and Kanata Go to America
2001-07-24
No overview available.
54. Everyone but Santa goes to America
2001-07-31
No overview available.
55. The Weird Object That Seiya Left Behind
2001-09-04
No overview available.
56. Mecha Wanya Attacks!
2001-09-11
No overview available.
57. Nozomu and His World of Dream
2001-09-18
No overview available.
58. Our Pet is Number One
2001-09-25
No overview available.
59. Peppo, Ruu, and Wanya
2001-10-02
No overview available.
60. Mikan's Work Place is the Saionji
2001-10-09
No overview available.
61. Miyu and Kanata's First Kiss
2001-10-16
No overview available.
62. Nagging at the Saionji Temple
2001-10-23
No overview available.
63. Spooky Mountain Villa
2001-10-30
No overview available.
64. Meeting a Penpal
2001-11-06
No overview available.
65. Inventions are so Boring
2001-11-13
No overview available.
66. A Friend, a Rival, a Competitor
2001-11-27
No overview available.
67. Teru Arrives From Planet
2001-12-04
No overview available.
68. Bowmeow Versus Mister
2001-12-11
No overview available.
69. Ousted Guava Falls in Love
2001-12-18
No overview available.
70. Momoka’s Christmas
2001-12-25
No overview available.
71. The Seven Gods of Fortune
2002-01-08
No overview available.
72. The Same Kimono as Miyu
2002-01-15
No overview available.
73. Miyu and Little Boy Kanata
2002-01-22
No overview available.
74. Goodbye Evil Gang
2002-01-29
No overview available.
75. Valentine’s Day in Heiomachi
2002-02-05
No overview available.
76. Ruu in the Lead Role at the Cultural Festival
2002-02-12
No overview available.
77. On the Night of the Full Moon
2002-02-19
No overview available.
78. See You Again
2002-02-26
No overview available.