**Change 123** is a manga series written by Iku Sakaguchi and illustarted by Shiuri Iwasawa. The manga has been published by Akita Shoten's Champion Red comic since June 2005 and ended April 2010. *Change 123* has 12 volumes.

## SynopsisEdit

The manga is about a high-school girl named Motoko Gettou who has wiki:Dissociative Identity Disorder. Although she tries to keep the antics of her three other personalities, Hibiki, Fujiko, and Mikiri (collectively called HiFuMi) a secret, she is found out by classmate Teruharu Kosukegawa. Although she is terrified by this at first, he agrees to keep her secret and the two become friends.

As Motoko seeks psychiatric help from classmate Kannami, Motoko's goal becomes to find a way to fuse her personalities together and become only one person.

## ChaptersEdit

The chapters of *Change 1-2-3* are notable because they have titles that are related to mathematical terms. Many of the titles even have mathematical symbols included in them.
Each volume usually has four chapters.

**Volume 1**Edit

- Case 1: HiFuMi³

- Case 2: Hibiki X

- Case 3: Dream+Love=?

- Case 4: Motoko| (Motoko's Absolute Value)

<h3><b>Volume 2</b></h3> <ul data-rte-empty-lines-before="1"><li>Case 5. "Approximation" </li></ul> <ul data-rte-empty-lines-before="1"><li>Case 6. "√Death (The Square Root of Death)" </li></ul> <ul data-rte-empty-lines-before="1"><li>Case 7. "Necessary and Sufficient Conditions" </li></ul> <ul data-rte-empty-lines-before="1"><li>Case 8. "i (Imaginary Unit)" </li></ul> <ul data-rte-empty-lines-before="1"><li>Case 9. "Inner Thoughts - Outer Thoughts" </li></ul>

**Volume 3**Edit

- Case 10. "1:2"

- Case 11. "Conversion"

- Case 12. "[3 - 2 = Hibiki]"

- Case 13. "100%"

- Case 14. "0: ZERO"

**Volume 4**Edit

- Case 15. "Greatest Value (MAX)"

- Case 16. "Expansion"

- Case 17. "Random Number"

- Case 18. "π2 (Pi Pi)"

- Case 19. "1/3 < 1/4"

**Volume 5**Edit

- Case 20. "Similarity"

- Case 21. "Set"

- Case 22. "Convergence Theory"

- Case 23. "Divergence Theory"

- Case 24. "Center of Gravity"

**Volume 6**Edit

- Case 25. "Dynamics"

- Case 26. "Hibiki x 2"

- Case 27. "Upper Limit"

- Case 28. "Isolated Set"

- Case 29. "Contraction"

**Volume 7**Edit

- Case 30. "Boundary Value Problem"

- Case 31. "Vector Tactics"

- Case 32. "Game Theory"

- Case 33. "Forrest Game"

- Case 34. "Superior Tactics"

**Volume 8**Edit

- Case 35. "Zero Division"

- Case 36. "Fujiko x 0 ≠ Fujiko + 0"

- Case 37. "2n2 (A Father's Circumstance)"

- Case 38. "893"

- Case 39. "Optimal Lines"

# =Edit

Volume 9**===**

- Case 40. "Known Discrepancy"

- Case 41. "Dotted Line"

- Case 42. "[Assume] Motoko=0"

- Case 43. "Vanishing Point"

- Case 44. "Crude Matrix"

**Volume 10**Edit

- Case 45. "Deduction"

- Case 46. "Smooth Image"

- Case 47. "Guided Direction"

- Case 48. "Critical Point"

- Case 49. "Roots"

**Volume 11**Edit

- Case 50. "Crossroads"

- Case 51. "3:2"

- Case 52. "No Relation"

- Case 53. "Dwelling in Memories"

- Case 54. "Company"

**Volume 12**Edit

- Case 55. "Transcendental Dimension"

- Case 56. "Stretched Space"

- Case 57. "Pertubation"

- Case 58. "The Flipped Coin"

- Case 59. "Factor Analysis"

- Final Case. "-Answer-"

**Volume Gallery**Edit