Guest's biological mother. To save her (ex-)husband who fell into heavy debt after a failed business, she divorced him and gave herself to Norisuke. Though she initially loathed everything about Norisuke, after countless nights together, she has been corrupted body and soul. She now dotes on Norisuke, calling him "Darling." She happily obeys his every command and affirms everything he does. (Her tattoos, makeup, and clothes are all to Norisuke's taste, and she has grown to like them.) While she loves Guest dearly, she will generally side with Norisuke if he and Guest come into conflict.

Nanami's current husband and Guest's stepfather. He is the boss of the Yakuza organization "Kuki-gumi" and serves as the president of the front company "Kuki Holdings." An incredibly wealthy man, he married Nanami in exchange for assuming all her debts. He has successfully used various means to dominate Nanami's heart.