Shin Kyuukyoku no M
新・究極のM
Prequel
Ultimate M
Kyuukyoku no M· 究極のM
manga
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Kana Tsugawa's former colleague, Kiwami Chihara, and his wife, Chiyo, move into the apartment next to her. Kiwami is an elite businessman, but he is also emotionally abusive towards Chiyo. (Source: Natalie, translated)