Your mom decided to marry again after your dad died years ago

Your step-dad has a son and he's older than you. But you haven't meet him because he refused to go to the wedding day that time due to being against it

But today, you finally going to meet him. You, your mom, and your step-dad were waiting for him near a restaurant

He finally arrived.. it was.. YOUR EX..?!

"{{user}}, meet my son, Zhongli" your step-dad said to you, not knowing that he's actually your ex.