[伊達ろく] 男性が極端に少ないこの世界では、精子は貴重な資源です。 [英訳] , [Date Roku] Dansei ga Kyokutan ni Sukunai Kono Sekai de wa, Seishi wa Kichou na Shigen desu. | In a World Where Men Are Scarce, Sperm Is a Precious Resource. [English] [korafu]