Hikari is Hikari by her neighbor Ozawa, who lost his wife in an accident and is still grieving. By chance, her husband recommends that she learn cooking from him, who is a cooking instructor. Attracted by Ozawa's lonely appearance, Hikari is swept away and accepts him. After a scorching hot sexual encounter that she has never felt with her husband, her body continues to crave pleasure again and again. Despite feeling guilty, the two are unable to resist their lust and become addicted to each other.