Futari Ecchi

Futari Ecchi (ふたりエッチ, Futari Etchi, lit."Two Person Ecchi") is a Japanese manga series written and illustrated by Katsu Aki. It has been serialized in Young Animal since 1997, with the chapters later combined into tankōbon volumes by Hakusensha. The series follows a newlywed couple in their mid-twenties, both virgins when they married, and chronicles their sexual explorations. The manga combines erotic elements with factual and informative statistics. In 2007, the manga series was licensed in North America by Tokyopop as Manga Sutra, only four volumes were released, comprising eight Japanese volumes.

Its Japanese title is a play-on slang term for masturbation, hitori ecchi ("single person ecchi"). The series has 29.5 million copies in print and is most famous for being a how-to guide combined with a story.

Two spin-off manga have been released, Futari Ecchi for Ladies focusing on the sexuality of women and Futari Ecchi Gaiden: Akira, The Evangelist of Sex focusing on Akira. There are also two sex manuals and an art book.

Futari Ecchi has been adapted into the follwing media.
 * Anime: 3 original video animation (OVA) series were produced and licensed by Media Blasters under the dubbed title as Step Up Love Story in 2007.
 * A 2-episode series by Souei Shinsha in 2002
 * A 2-episode series by HAPPINET from 2003 to 2004.
 * A 3-episode series by AMG Entertainment and Production Reed in 2014.
 * Live-Action: The following were produced
 * A 3 episode TV drama series directed by Gen Yamakawa that aired on WOWOW in 2000.
 * A 12-episode web series was streamed on Ustream in Summer 2011.
 * A 4-theatrical film series by AMG Entertainment began from 2011 to 2012.