Sign-In System In Another World

The main character of this story, Xu Yongzheng is nearly killed in a duel for courting an Inner Disciple's crush. The elder monitoring the match turns a blind eye to the Inner Disciple's actions. Xu Yongzheng during his last dying moments unintentionally awakens the Sign-In System. --- "Sign in!" "Congratulations! The owner has obtained S-Class Item: Isolated Space!"