“Why not me, Yuna? Let me be the man you cheat with.” Five years ago, Yuna’s relationship with her adult son’s adult friend Hajime changed forever. After discovering her husband’s affair, she was comforted by Hajime’s clumsy kiss and granted his wish that same night. It began partly as revenge against her husband and partly from affection for the inexperienced young man. They continued craving each other for five years, until their creampie affair finally began to change into something more.