Incompetent Person: Become Nana Hiiragi's Brother at the Beginning!

Once he traveled through time, Hiiragi discovered that he had become the biological brother of Hiiragi Nana, the heroine of Nana the Incompetent, and had boarded a pirate ship and was sent by the organization to assassinate the high school students with superpowers on the island! Hiiragi, who is familiar with the plot, thought of a series of bugs with special powers such as fantasy killers, time backtracking, immortality, necromancers, forest ice and fire people, etc. On the island, and his expression gradually became speechless. Who would think that a pair of brother and sister with no skills and bare hands can wipe out all the people on this island? Just when Hiiragi is at a loss, a question-answering system is bound to him. As long as he makes the right choice, he will be rewarded! It's just that the questions in this system are becoming more and more irregular... Inukai Man is very sorry for your injury and wants to use his own powers to treat you. Do you want to accept the baptism of saliva from Inukai Man? Your sister, Nana Hiiragi, invites you to assassinate a person with abilities late at night. Your choice is a to agree to her and gain 1 physical point*; b to refuse and hold her in your arms! Hiiragi: This is an inappropriate question! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.