Fun fact: there has been a Pun in here "Tsundere Step sister":The Fact that "we Are Siblings, ""i Hate it to death" she meant that being both step brother and sister she doesnt have the chance to marry him
“To promote LN of the same name”
And this LN is more than chapter? I’m just not really seeing how a light novel can sustain itself for long on that premise. If they were, the LN author gets some kudos from me