https://ncode.syosetu.com/n2129ei/
By: Taikoban

The noble class that treats those born with white hair or heterochromia as treacherous snakes, Shirley was born into the family of the most powerful duke in the land adorned with stunning hair the colour of snow, and non-matching red and blue eyes.
Hated by her own family, and having the only man who she ever loved snatched away by a jealous younger sister on her wedding night, she is imprisoned on false charges.
Enduring torture and humiliation, she vowed to take revenge against those who wronged her. But, even though she escaped, in her belly there was the child of her former fiancée.
Even if the man himself is hateful, an unborn child is without sin. After giving birth to healthy twins, she thought to leave them at an orphanage for safekeeping, but…
“Ah, what to do, my daughters are just too cute.”
Shirley was floored by the feelings she held for the two girls she had brought into the world. Choosing motherhood over revenge, she fled the Empire and settled in a remote town in the neighbouring Kingdom. In order to support her children, she found herself entering through the doors of the Adventurers Guild. It would be nice if they could live a nice quiet life out here, where the empire won’t think to look for them…
“Miss Shirley! Calamity-class monsters are appearing in the Kingdom! Can you help us!?”
“I’m very sorry, but I have to decline. I’m helping my daughters with their homework today.”
After ten years, she had somehow become known around the world over as “The Demonic White Sword”.
Table of Contents
Chapter 1 through 86
Chapter 87: A Crisis for the Doting Parent
Chapter 88: The Daughters While the Demon is Away
Chapter 89: Peel Off the Pretense
Chapter 90: Time to End This
Chapter 91: Phantom Thief, Death Confirmed (Tentative)
Chapter 92: Judgment and Reunion
Chapter 93: Epilogue
Volume 5: Sports Meet
Chapter 94: Prologue
Chapter 95: The Coming Sports Meet
Chapter 96: Meanwhile, At the Empire
Chapter 97: Grandmother
Chapter 98: Witch’s Invitation
Chapter 99: Imperial Idle Talk
Chapter 100: The New Principal is a Dangerous Creature
Chapter 101: Wills of Steel Have Become Easier to Bend Recently
Chapter 102: Past Incident
Chapter 103: Talking About Decorating Apples and Sausages
Chapter 104: Imperial Idle Talk 2
Chapter 105: Disaster Before the Sports Meet
Chapter 106: Sudden Participation
Chapter 107: Canary’s Plot Revealed
Chapter 108: Ball-Toss Game
Chapter 109: Borrow Frenzy Race Part 1
Chapter 110: Borrow Frenzy Race Part 2
Chapter 111: Lunchtime
Chapter 112: Quiet Fury of the Semi-Immortals
Chapter 113: Intermission Interception Part 1
Chapter 114: Intermission Interception Part 2
Chapter 115: Intermission Interception Part 3
Chapter 116: Mopping Up After the Sports Meet
Chapter 117: The End of the Earlgrey Family
Chapter 118: Epilogue
Volume 6
Chapter 119: Prologue
Chapter 120: Sophie VS. Tio: Morning Wake Up
Chapter 121: Sword Demon Style: Correct Method to Capture Dungeons
Chapter 122: Written Request for Reconciliation…….
Chapter 123: The Child Doesn’t Resemble the Father One Bit
Chapter 124: In this World Flooded with Monsters
Chapter 125: Education is Something any Parent Would Worry About
Chapter 126: Doting Parent Deterioration
Chapter 127: Saint of Nirvana
Chapter 128: Canary’s Natural Enemy
Chapter 129: Shopping is the Best…….
Chapter 130: Love Triangle (With One in the Dark)
Chapter 131: Shirley, ○○tion
Chapter 132: Caught by a Bothersome Angel