Taeju is a strong male alpha, he waits for the right time that he'll find his mate soon. Not long after, he met Euihyun. Euihyun was different from Taeju, he is a short tempered, and cares about his love ones. While on the other hand, Taeju was more clingy and affectionate. But he can be dangerous when someone bothered what's his.

Euihyun already find out that Taeju is involved on Mafia Don's and he is hell'a wealthy. He helped Euihyun out to sort things out, like aiding, paying, etc his debts. The more they spent time each other, the more they fell inlove to each other. Taeju was very protective about Euihyun, while he still hasn't show his affection for Taeju. But secretly, he is. And things start to get more... Intimate. When the time Euihyun thought he had a fever but Taeju can sense that he's having a heat cycle, he "helped" Euihyun to get rid of it.

It's been months since the incident. Euihyun's stomach's in pain when Taeju and him are apart, but when they're near to each other, the pain will ease, that confused Euihyun but he didn't pay attention to it. Taeju was completely oblivious about his situation cuz Euihyun kept his mouth shut, thinking it was just a stomachache.

One of these days, Euihyun got kidnapped and Taeju went very furious, he ordered his men to find Euihyun, and when his men was about to reach Euihyun, the baddies stopped them and throw a commotion, Taeju's instincts immediately turned on. While Euihyun find his way to leave the room where he was locked up. And after all this actions, they finally reunited again. Although, Taeju got stabbed.

At the hospital, when Taeju woke up, Euihyun wants to sort things out, their relationship. Out of nowhere, Euihyun was about to go to the restroom but he faints and fell on the ground, Taeju quickly rush towards him and kneel over.

After a moment, the doctor told them a news that made Taeju surprised. Euihyun's possiblilities and perspective were right.

"I'm pregnant?"