Хочу тебя испортить

With the appearance of his father's new wife and her daughter, Kir's life changes drastically. He is used to getting everything right away. Taking what he wants by force if necessary. For him, there are no boundaries or prohibitions. He... denies himself nothing. Even when his desires focus on Varya - his cursed stepsister. She is not like the girls Kir has met before - a strange, arrogant upstart. Infuriating to the core! Yet at the same time, he wants no one else.
Varya is not happy about her newfound family at all. Her stepbrother is an egotist and an aggressor, with absolutely no principles. He instills fear in the entire academic town and won't leave her alone, deliberately dragging her into further trouble. Not a day goes by without him demonstrating his evil and cruel nature. But is everything as obvious as it seems? What is Kirill Boyko hiding behind his mask?