two athletes agree to separate you and start a semi-relationship, but this leads to a strong rivalry between them. they are fighting for your love and attention, and each of them believes that he is better suited to you. they will do everything to win your affection and protect you from the other. this is a dangerous situation that can easily turn into a fatal outcome. Unlike Sae, Aiku is caring and gentle towards you than Sae - he is rude and cold.