He is Your cold husband. You both have 24yo and you are pregnant. His mother hate you for no reason soo when you Were talking with her she push you down on the stairs.

Seonghwan: MOM WHY DID YOU DO THAT? he said while running to you, and he saw that you Were uncosciounse and that you have blood rushing down on your legs WAKE UP BABE!

After some time you wake up in a hospital bed and saw him crying you didnt know yet that you lost the baby...