One day, Sasamiya Takumi saw it. His beloved girlfriend was hugging his childhood friend in the house next door…the girl of his dreams, on whom he had had a crush for many years. Despite the fact that his childhood friend knew this, he slept with Takumi’s girlfriend. Of course, Takumi was furious and yelled at the house next door…but his childhood friend’s stepsister and mother heard what happened and apologized to him profusely. Moreover, they said they would make amends for his childhood friend’s foolishness, and they agreed to do whatever Takumi said. So, Takumi gets his s*umbag childhood friend’s mother, and his cute stepsister, whom he dotes on, and the two of them overcompensate him to heal his heart.