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Watching 1. Suddenly 4 People in the Family?!
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.
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2. Ruu-kun is Climbing the Chimney
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.
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3. Chris Drops By
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.
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4. Momoka and the Necklace
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.
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6. Mama Comes Over on Mother's Day
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7. Ruu-kun, Popular at School
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8. Ruu-kun's Acting Debut
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9. A Date in the Park Between Cousins
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10. Playing with Spaced-Out Santa
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11. June, on Father's Day ... Papa Comes
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12. The Mysterious Boy, Yaboshi Seiya
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13. The Mysterious Planet Sharaku
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14. Help! Transforming Wanya
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15. Mikan Ran Away, Saionji!
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16. Ocean and the Lovers' Tree
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17. India's treasure is SAIONJI?
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19. The Mysterious Home is Miyu's Real House?
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20. The Off-season Home Visit
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21. Principal, Monkichi Reunite
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23. Everyone, Gather at Saionji's
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24. The Blackout Halloween
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25. Ruu-kun and the Department Store
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26. Yaboshi Saiya's Warning
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27. A Correspondence with Ruu's Parents
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28. Sister Comes to Saionji
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29. Nanami and the Mysterious Tsukemonoishi
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31. The First Christmas with Saionji
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33. Kanata's Childhood Friend
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34. Kanata's Promised Date
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36. The Heiomachi Onsen Excursion
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38. Ruu-kun Has Multiplied
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39. All 100 Ruu-kuns, Gather!
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40. Kanata's Rival Appears?
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41. Kanata and Nozomu's Showdown
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43. The Family Assembles at Saionji
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44. Koinobori Aren't Scary!
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45. Cinderella Inside the Book
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46. Chris and the White Whale
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47. Miyu and Mini-Miyu Go to School
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48. Santa and Kanata's Weird Pot
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49. Mizuno-sensei's Mysterious Trip
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51. Mika-san's Mysterious Promise
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52. Saionji's Ghost stories and the Mysterious Koishi Stones
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53. Miyu and Kanata Go to America
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54. Everyone but Santa goes to America
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55. The Weird Object That Seiya Left Behind
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57. Nozomu and His World of Dream
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58. Our Pet is Number One
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59. Peppo, Ruu, and Wanya
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60. Mikan's Work Place is the Saionji
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61. Miyu and Kanata's First Kiss
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62. Nagging at the Saionji Temple
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63. Spooky Mountain Villa
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65. Inventions are so Boring
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66. A Friend, a Rival, a Competitor
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67. Teru Arrives From Planet
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68. Bowmeow Versus Mister
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69. Ousted Guava Falls in Love
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71. The Seven Gods of Fortune
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72. The Same Kimono as Miyu
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73. Miyu and Little Boy Kanata
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75. Valentine’s Day in Heiomachi
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76. Ruu in the Lead Role at the Cultural Festival
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77. On the Night of the Full Moon
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