When they were teenagers in China, Happosai stole Lukkosai's Brocide Butterfly (a tablet of Rainbow colored ink), which caused their friendship to crumble, and they never spoke again.
When they were teenagers in China, they stole beautiful breast prints from each other, which in turn caused their friendship to crumble. During this time Happosai steals Lukkosai's Brocide Butterfly (a tablet of Rainbow colored ink) and they never spoke again.