Jin is the resident of room 103. Jin is a third-year student of Suiko. He is Misaki's childhood friend and a playboy. He has dated several girls, including Misaki's elder sister, but in the end he breaks up with all of them. He then wanted to attend a 大学 in Osaka to achieve his dream. He even gives Misaki a marriage registration form to be handed in after he returns from Osaka but Misaki turned the form in immediately after Jin left and so the two are officially married to each other ^_^
