5 years into married life. Hikari, a wife living happily. One day, she was asked by her husband's father to take care of her brother-in-law, Ikko. Ikko had a problem. He was a habitual offender who caused trouble when he drank alcohol. Hikari starts a no-alcohol life with her husband and Ikko, but Ikko secretly drinks alcohol... Hikari, who discovered that, ...