Disabled Couple Bullied to Death by Tour Guide

Abuse, Abuse, Abuse! Short! It's More Cruel Than a Bone-Eroding and Dangerous Situation. I Can't Help but Burst into Tears.

It's so Cruel That It Makes Your Heart Hurt and Makes You Shed a Lot of Tears.

Both ancient and modern texts are acceptable. The rating should not be too high, just a bit lower, and there should not be too many chapters.