★ 2.0
★ 4.0
★ 5.0
★ 6.0
★ 4.7
★ 6.8
★ 6.4
★ 3.0
★ 3.5
Eiji, a teenager eager to follow in his late father's scientific footsteps perfects one of his old experiments to diminish the barrier between pain and pleasure.
