第 87 集: 小泉以良心之戒威脅幽助，幽助介入並擊敗一也
1994年7月2日 播出
Koenma threatens Sensui with his wicked seal conscience ring, a defensive spell in his pacifier that can trap even S-class demons. Yusuke stops Koenma before he attacks and handily defeats Kazuya. Shinobu, the primary personality, takes control of Sensui's body. (Source: Wikipedia)