Kyōsuke's younger cousin, Kazuya looks like a younger version of him. On several occasions people have mistaken Kazuya being Kyōsuke's son. Kazuya has "The Power" as well. In both the manga and the anime he uses telepathy almost exclusively, with telekinesis being used on very rare occasions. Kyōsuke and Kazuya can swap bodies by banging their heads together, and many stories with Kazuya involve him doing so either to avoid something unpleasant, or to "help" Kyōsuke pick which female to focus on. In the manga Kazuya has two female friends, and his situation with them somewhat mirrors the situation between Kyōsuke, Madoka, and Hikaru.

It can be hard moving to a new school, and fifteen-year-old Kyosuke has it harder than most. He’s fallen head over heels for his classmate Madoka, a girl who won’t even give him the time of day, and unintentionally ended up dating her best friend, Hikaru, instead. Worst of all, Kyosuke and his family have amazing supernatural powers, but he has to keep them hidden from the rest of the world! How is Kyosuke ever going to balance the affections (or lack thereof) of two girls, schoolwork, and his secret abilities all at the same time?<br>
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(Source: Discotek Media)

Kazuya Kasuga