Airi's first impression of Aram is that he is a cute little boy, but he quickly comes to stand in the way of her plans of living a normal life. Her dreams of a normal marriage disappear when she unwittingly performs marriage vows with him. Because of the vows, she and Aram both now have matching insignias on their chests. If any man aside from Aram kisses the symbol, then her heart will stop beating. However, she slowly becomes fond of Aram and finally realizes her feelings during their high school summer trip to the beach, where Raz tries to kill her by kissing the symbol on her chest. After that, she was completely devoted to Aram.