Nagai Asami

Her maiden name is Igarashi Asami. She and the protagonist Ryousuke dated from high school until college, and they both had their first time with each other.

One day, their mutual friend Nagai Kouji pushed down Asami and had sex with her, which caused her breakup with Ryousuke. She married Kouji soon after.

Kouji was deceived by a friend, which left him with a huge debt. To help her husband, Asami accepted Ubai's job offer where she and Ryousuke met once again.