Kuroi Seishi (黒い精子) is a supporting character in One-Punch Man Season 2, voiced in Japanese by Yuuichirou Umehara. The series' music includes "「Creditless」One Punch Man OP / Opening 2「UHD 60FPS」", "One Punch Man Season 2 Ending Full - Chizu ga Nakutemo Modoru kara || Makoto Furukawa".
