World 1: Campus world (ignorant) 2: Overbearing CEO world (I don't know how to love) 3: Male blog world (I only have you) 4: King's world (Tsuna's ethics can't separate you and me) 5: ABO world (love period is as sweet as ever) Pheromones) 6: Lawyer, gangster world (I want to hug you even if we are on the opposite side) 7: Soldier world (our love is protected by the law) 8: My little pet world (everything is possible with you) 9: Cultivation world (I want to be with you for a long time)
Concept: sweet love