There were several novels that described how parents were biased towards their younger sister, including Biased Parents, Parents Regret After Being Biased Towards Their Younger Sister, and Biased Parents Regret After My Death. These novels had all been completed, but no specific recommendation information was provided. Therefore, he was unable to give a specific novel recommendation.
Yes. My Demon originated from a manhwa and has made certain changes to fit the medium of the adaptation. But the core elements and storylines are drawn from the manhwa source.
Well, you could try doing things he likes together to strengthen the bond. Also, showing appreciation and support for him can go a long way. Sometimes, small gestures of love and care can make a big difference.
One way could be to have heart-to-heart conversations regularly, listen to his perspective, and work on resolving any conflicts together. Surprising him with small gestures of love and support might also make a difference.
It is not appropriate at all. Stories should promote positive values and good human relations. A story with such a theme is not only offensive but also can have a negative impact on the readers' mental and moral state.