husband's friend

Reira married her friend from school, Kenji. Her husband has always been kind and Reira has been filled with happiness. One day, he happens to meet his best friend from school, Oki. Oki had started his own business and set up an office nearby. The husband is overjoyed to be reunited with his nostalgic old friend, and encourages his wife, Reira, to help with Oki's work, which is still unstable. I didn't know that Reira and Oki were lovers in the past... And Reira's heart is once again attracted to Oki, a wild and forceful man who is the exact opposite of her kind husband...