Summary
One day, Mai remembers that her perfect stepbrother is a character in a death game manga, and that one year later he will hold a death game involving all of his classmates, killing his sister in the process. Mai plans a variety of surprises for her stepbrother every day based on what he said in the manga, \Nothing unexpected happened, so I was bored,\ but as the days go by, he begins to show abnormal signs... Only I know what my brother\s really like. Pepu\s comicalization of Inada Sou\s popular web novel!
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