Haru has finally revealed his forbidden feelings to his older stepbrother Aiden, which, to his amazement, is reciprocated. Now the couple has been dating for six months, and after a grueling exam period, the two, along with their brothers, head over to Japan for a much-needed, long overdue winter vacation.

Just when Haru is beginning to enjoy the trip and his blossoming relationship with Aiden, the appearance of Aiden's old flame threatens to destroy Haru's newfound happiness. Adding to the already unpleasant situation is the emergence of changes in two of his other stepbrothers' behavior toward him, which confuses Haru, stirring up different sorts of emotions within him that are hard to explain.