This cube craft paper toy is the Sado Taro, based on the Japanese light novel series MM! (by Akinari Matsuno). A manga adaptation by Issei Hyoju serialized between September 2008 and February 2012 issues of the seinen manga magazine Monthly Comic Alive. This papercraft is designed by ginko.
Taro Sado is the hero of the story, and a true masochist. He went to the same middle school as Yūno, who is at fault for turning him into a masochist. He is not sexually attracted to his relatives, though his mother and older sister are attracted to him and have an over protective relationship for him.
He is sometimes forced to perform cross-dressing (in the anime he was cross dressing because he was hypnotized to by defult, love Tatsukichi who which tries to avoid Taro by cross dressing). Taro is known to have a ridiculous amount of "Pervert Energy", which was employed by Noa in one of her schemes.
Despite the fact that he is a self-proclaimed "Super Masochist", Taro won't hesitate to help out his friends such as rushing Mio to a hospital when she collapsed during their mock-wedding at their date, trying to beat up the senior who attempted to sexually assault Arashiko way back despite being outmatched, acknowledging Tatsukichi's cross-dressing and telling him that he doesn't mind.
His surname Sado is probably a pun on sadomasochism which is particularly displayed in a wide array of scenarios throughout the series.
You can download this cube paper craft toy from here: MM! - Sado Taro Cube Craft Free Paper Toy Download