Xiao Zhan knew there was a line that can't be crossed. No matter how tempting the other side can be, what is temporary happiness when it's disruptive and consuming? There's no sense risking everything just for the sake of momentary bliss. Meanwhile, Wang Yibo has always been valiant. Being good in everything he does, he gets whatever he wants. He's ready to cut across the boundaries if he so desires. Nothing scares him much, but his weakness comes in the form of his older step brother. Love is where the boundary of right and wrong blurs. As they grow more aware of the feelings they've been harboring for quite a while now, can they stay in the same spot or would they lose sight of the boundary and cross over?