Left at the Altar

In a world where people are forced to marry by age 30. Kongpob is forced to go into the mating DNA system after he is left at the altar by his girlfriend. With no choice, a 25-year-old Arthit Rojnapat is chosen for him. The question is why is a 25-year-old Omega in the mating pool when he was 5 more years until time starts ticking by? Will Kongpob and Arthit be able to make things work? Can they fall in love? Or will secrets and old lovers break them apart?