Daiki Korenaga

Daiki Korenaga is introduced as a childhood friend of Ninako's and has strong feelings towards her at the beginning of the story. He grew attached to Ninako after his parents divorced two or three years prior to the start of the manga to which he had to make the choice of living with his mother and older sister or his father. Since choosing to live with his father his relationship with his older sister has not been so good. He eventually falls in love with and starts dating Sayuri, Ninako's friend.