In order to protect his younger brother, Cheng Lan faked his own death. When he stabbed the knife into Cheng Chuan's heart, what followed was Cheng Chuan's kiss.
Tell me how to describe this love.
That knife you inserted with your own hands made me sick.
Shiro-Kuro-chan×Kuro-Kiri Shiro-ge
Intention: Love that never fades