ホームドラマしか知らない

The sixth-grader Reo has to be mature for his age because of his divorced parents. When his father decided to remarry, Reo was sent away to live with his estranged mother who had remarried, too. It turns out the only one who could actually take him in is Reo's older step-brother who he had never met. This will make for an awkward family life? Note: Includes 2 extra chapters.