In the late summer of 2011, Rokudenashiko took a mold of her own vagina and started colouring and decorating the plaster cast. At the time, she was drawing a manga about vagina(Called MANKO in Japanese), but she was running out of ideas, so she thought, ”Let's try taking a mold of my Manko”, and as just taking a mold was boring, she tried colouring it in. From this point on, it became boring to just paint them and she started to play with them by decorating them with sparkles and dioramas, just like high school girls' deco-den.（The term DECO_DEN comes from the words ‘decoration’ and ‘denwa’(telephone). She wanted to cross Manko(vagina) with masculine concepts and symbols (e.g. Sentai anime) in this piece. But as expected, it has caused controversy from various quarters. Incidentally, she also modified and combined robot toys sold in Chinese night stalls and made a Gandaman version that ran and made noises when batteries were inserted, but this was unpopular because it was very noisy.