I think comparing this game to DmD is insulting to Pandelo. There are standard features in a broad selection of games. Like, for the incest genre, there's that one nympho aunt with the broken moral compass, the MC and his family having just undergone a major transition like moving to a new city, the older bitchy sister that hates him, the younger one that loves him, the father being absent, the mom having financial trouble, etc. There's like 50 of these of these re-occurring themes that show up in 20+ games each. No one is copying anyone. It's just how these things work.
Japanese VNs, as someone mention, have their own set of similarities - For the moe genre, you have the childhood friend that secretly loves the MC, the younger-step-sister struggling with her forbidden love, the parents on vacation/work trips, the cultural festival chapter, that one teacher at school that is far too young and too hot to be a teacher, the test of courage at the school overnight, the misunderstood student council president, the beach/bikini chapter, "misunderstandings" where the MC gets beat up by girls because they don't wait for explanations, etc. They're not clones of each other, either. It just comes with the genre.