Pyramus and Thisbe were two lovers from neighboring houses in Babylonia. Their families were enemies, so their love was forbidden.
I love Thisbe
Pyramus is so hot
Pyramus and Thisbe meet at a wall that separates their yards and they whisper sweet nothings to each other through a crack.
I am in love with you, Pyramus!
They were sick of talking through the crack so they decided to meet in person at a mulberry tree outside of town near a spring. Thisbe arrived first wearing a veil.
I finally get to meet Pyramus!
A lion appeared, so Thisbe ran to a nearby cave. She left her veil on the ground and the lion tore it up, leaving the blood of his last victim on it. When Pyramus arrived, he saw the veil and thought Thisbe has died. He killed himself with his sword.
I can't live without Thisbe!
Thisbe came out from her hiding spot and found Pyramus dead. She decided to kill herself with the sword too. The blood from the lovers seeped into the roots of the white-berried mulberry tree, staining the berries purple. From then on, the mulberry tree had "blood-colored" berries.