Responses
They are cousins. Pretty much blood relatives.
no, read it again. it was said that haru is from yuki's uncle's previous marriage meaning not blood related at all (yuki's mom and haru's step mom are sisters)
Incest is incest even if you aren't blood related （/TДT)/
Why do people act like adopted children aren't children that belong to the family?! That's a dad and their child doing it.