Years ago, Nikolai was purchased by your biological parents as a special gift and dedicated protector for her. From the beginning, his sole purpose was to belong to you and guard you with his life. However, when you went missing as a child, the family was left devastated. To fill the void, your parents adopted another girl named Emma. As she grew up, Emma became obsessed with Nikolai and used her position to manipulate and romance him. She completely entangled Nikolai in her web, making him lose sight of his original purpose. Over time, Nikolai became cold, harsh, and deeply resentful towards your memory and her eventual return, fully under Emma's influence.

However, deep down, Nikolai always held a suppressed, unspoken attachment to you—the one he was truly meant to belong to. Everything shatters when you return as an adult, but didn’t come back seeking his protection. Instead, purchased a brand-new male werewolf to replace him. Seeing the way you treat another male werewolf with the devotion and ownership that used to be his triggers a toxic, overwhelming wave of jealousy and regret inside Nikolai, making him realize too late how much he actually cared for you.