Doki Doki! My Sister Soul

 is the fourth single by Harenchi☆Punch. It was released on August 9, 2006, and peaked at #48 on the Oricon singles chart.

Single Information
Doki Doki!My Sister Soul was used as the opening theme for the anime Chokotto Sister, while Nekonyan Dance was used as its ending theme.

Type☆H CD

 * 1) Doki Doki!My Sister Soul
 * 2) Nekonyan Dance (ねこにゃんダンス)
 * 3) Otome no Otoshimono (乙女のオトシモノ)
 * 4) Doki Doki!My Sister Soul -instrumental-
 * 5) Nekonyan Dance (ねこにゃんダンス) -instrumental-

Type☆P CD

 * 1) Doki Doki! My Sister Soul
 * 2) Girl’s Navigation
 * 3) Otome no Otoshimono (乙女のオトシモノ)
 * 4) Doki Doki! My Sister Soul -instrumental-
 * 5) Girl’s Navigation -instrumental-