Came from that YouTube video. Let me just say, really enjoy the concept of this. Considering the amount of NTR doujins I've come across when searching for my favorite series. One thing's for sure, I don't have any sympathy for the OG ML considering that he's acting like a possessive creep. If...
I commend Estelle for not snapping at the redhaired bitch's audacity and taking it out on the baby. Since all that awaits that bitch is a cruel fate in the depths of hell itself.
I'm getting some heavy Samayoeru Tensei-sha-tachi no Relive Game vibes from this. Perhaps the MC will turn out to be more interesting in this, but at the moment, he's a carbon copy of almost every anime trope I've ever seen.