With All of My Heart Iko settles into Teru's middle school after being transferred, with the two now becoming classmates. Teru feels guilty for not being able to save her properly from the roller coaster accident, but Iko feels no resentment towards Shy for her injuries. Suddenly, a mysterious boy appears. The boy puts a dark ring on Iko's finger which causes her to turn monstrous and lash out in rage. When Teru asks what the boy is after, he claims he wants people's hearts to be freer by releasing them from their cages. In an attempt to calm her down, Shy allows Iko to release all of her pent-up rage on her. She releases the negative feelings harbored inside her from the time parents died in a fire which she blamed herself for. Afterwards, Shy removes the ring as Iko has calmed down.