The phrase "doujindesutvanatanosemenkaishuushimasu" appears to be a stylized Japanese phrase often associated with adult-oriented doujinshi (fan-made works) or specific internet subcultures. Broadly translated, it means "I am from Doujin TV and I will be collecting your [semen]."
フィクションとしての「ドウジンデスットヴァナントーセメンカイシュウシマス」 doujindesutvanatanosemenkaishuushimasu new
In the vast world of independent Japanese manga—commonly known as doujinshi—few titles grab attention as immediately as those published under the Doujindesu umbrella. One of the more provocative entries making waves in online circles is Anata no Semen Kaishuushimasu doujindesutvanatanosemenkaishuushimasu new
(roughly "collecting your semen"), which is typically the title or theme of specific adult-oriented doujinshi doujindesutvanatanosemenkaishuushimasu new