01. Catarina's Brain Conference 1
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02. Catarina's Brain Conference 2
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03. Catarina's Brain Conference 3
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04. Catarina's Brain Conference 4
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05. Catarina's Brain Conference 5
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06. Catarina's Brain Conference 6
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07. Catarina's Brain Conference 7
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08. Catarina's Brain Conference 8
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09. Catarina's Brain Conference 9
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10. Catarina's Brain Conference 10
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11. Catarina's Brain Conference 11
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12. Catarina's Brain Conference 12
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13. Catarina's Brain Conference 13
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14. Catarina's Brain Conference 14
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15. Voice Drama #1: Geordo
Companion to the anime, a short retelling of the first episode from Geordo's perspective.
16. Catarina's Brain Conference 15
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17. Catarina's Brain Conference 16
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18. Catarina's Brain Conference 17
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19. Catarina's Brain Conference 18
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20. Voice Drama #2: Keith
Companion to the anime, a short retelling of the first episode from Keith's perspective.
21. Voice Drama #3: Mary
Companion to the anime, a short retelling of the second episode from Mary's perspective.
22. Catarina's Brain Conference 19
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23. Catarina's Brain Conference 20
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24. Voice Drama #4: Alan
Companion to the anime, a short retelling of the second episode from Alan's perspective.
25. Voice Drama #5: Sophia
Companion to the anime, a short retelling of the third episode from Sophia's perspective.
26. Voice Drama #6: Nicol
Companion to the anime, a short retelling of the third episode from Nicol's perspective.
27. Looking Back Voice Drama: Snake
Toy Snake quickly recaps the first 3 episodes.
28. Catarina's Brain Conference 21
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29. Catarina's Brain Conference 22
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30. Catarina's Brain Conference 23
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31. Catarina's Brain Conference 24
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32. Catarina's Brain Conference 25
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33. Catarina's Brain Conference 26
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34. Let's Learn With Katarina 1
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35. Let's Learn With Katarina 2
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36. Let's Learn With Katarina 3
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37. Let's Learn With Katarina 4
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38. Let's Learn With Katarina 5
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39. Let's Learn With Katarina 6
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40. Let's Learn With Katarina 7
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41. Let's Learn With Katarina 8
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42. Let's Learn With Katarina 9
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43. Catarina's Brain Conference X 1
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44. Catarina's Brain Conference X 2
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45. Catarina's Brain Conference X 3
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46. Catarina's Brain Conference X 4
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47. Catarina's Brain Conference X 5
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48. Catarina's Brain Conference X 6
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49. Catarina's Brain Conference X 7
The myths behind some of history's most defining moments and revealing facts behind America's space explorations.
50. Catarina's Brain Conference X 8
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51. Catarina's Brain Conference X 9
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52. Catarina's Brain Conference X 10
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53. Catarina's Brain Conference X 11
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54. Catarina's Brain Conference X 12
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55. Catarina's Brain Conference X 13
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56. Catarina's Brain Conference X 14
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57. Catarina's Brain Conference X 15
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58. Catarina's Brain Conference X 16
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59. Catarina's Brain Conference X 17
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60. Catarina's Brain Conference X 18
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61. Catarina's Brain Conference X 19
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62. Catarina's Brain Conference X 20
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63. Catarina's Brain Conference X 21
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64. Catarina's Brain Conference X 22
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65. Catarina's Brain Conference X 23
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66. I Met My Destined One...
The OVA will tell the childhood stories of the main characters, adapting from the first volume of Satoru Yamaguchi's original light novel.
Bundled with the seventh limited edition volume of the manga.