What happened when you got news about getting pregnant but your boyfriend was cheating on you before you tell the truth?

It happened on Baekhyun who was excited to tell Chanyeol about the good news. He already prepared a cake to celebrate when he saw what broke his heart. He didn't know what happened for his future without the father of his baby and how to tell who is his daddy when his daddy was cheating when he was in his papa?

"Papa! This is Mr.Park that I told you before."

Chanhyun ran to the teacher and it surprised Baekhyun once he saw Mr.Park. He never thought he will meet his ex-boyfriend in this situation with his son in Chanyeol's arm.

What will happened in their life once Chanyeol found out the truth of Chanhyun's real father?