Hardcore lover~'s feed

Hardcore lover~ created a topic of Whose Baby is it?

I don't really hate the step sibling story. It might be because the step sibling stories are in trend right now that's why the author decided to add that trope in the story. In my opinion nothing wrong they're just following the trend.
But the actual problem is I don't see the chemistry between the step sibling
Author is just trying to force that trope between them.
Even if it's step sibling story chemistry between them matters more which matter of facts there's none between this two.
A and yi has grew up together as sibling. A always emphasized with Yi more as a sibling. Even when he got to know they aren't biological sibling. He didn't wanted to lose yi as his brother and tried to make it believe everyone that they're actual sibling.
Yi story doesn't make sense to me. He hated A when he was born coz he was afraid that their parents won't love him anymore thus he pretended to be a good brother just to fit in the family and then he fell in love with A? Doesn't make sense to me
His desire to protect A is more like brother complex rather than lover.
And his parents agreeing to this is weirdest of all.