Kou Nanase

Momoko Uchida lives in an expensive apartment in Tokyo. She is a manga writer. Momoko Uchida is in her second marriage and has a son attending a university. Her friend Mizuki Tomizawa is the same age her and lives in the same apartment building. One day, a newlywed couple, including wife Rumi Kamoi, move into the same apartment building. The newlywed husband is Momoko Uchida's ex-husband. They divorced 20 years ago.

When feisty college student Yuri is attacked at a party, she's saved by Oya Toshiomi, the underboss of a yakuza syndicate. Despite her obvious attraction to him, she convinces herself that she's not in the market for a bad boy type. But when they meet again, she finds herself irresistibly drawn to him—kicking off a steamy and dangerous love affair that threatens to consume her, body and soul.