My Sister Is a Kurumi

The male protagonist choked to death while drinking water at home and traveled to the world of dating. At this moment, he heard the most beautiful sound Ding, the selection system has been activated Becoming an ordinary person and not participating in the main plot will reward you with one billion yen Becoming the younger brother of Itsuka Shiori and the older brother of Itsuka Kotori, he was rewarded with the body of a top student Becoming the younger brother of Kurumi Tokisaki will reward you with the Kamui Space Spirit Equipment. The favorability of Kurumi Tokisaki will be 75. Where should the male protagonist go? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.