Flipped

Aegon is the oldest son of head omega Jimin and head alpha Jungkook of Wildfang Shadows, and he is to be the next head alpha. But he is disappointed when his desired omega, Jennie, chooses his brother to mate and marry instead of him, leaving him no choice but to mate the less attractive omega brother of Jennie, Taemin.

Aegon tries his best to avoid Taemin, despite his mother's attempts to get them to know each other.

When Jimin and Jungkook noticed his dislike for Taemin, they decided to tell Aegon about their past, which comes as a surprise to Aegon when he comes to learn how horribly his alpha father (Jungkook) once treated his omega father (Jimin) because he always thought that his parents were a match made in heaven.

So this is the story Jungkook and Jimin tell their son about how they fell in love with each other.