With his good looks, Keita can get any girl to fall in love with him. Despite being Mr. Popular at college and the cafe where he works part-time, Keita takes an unusual interest in Mao, the girl known as "Iron Mask Mao" to her colleagues. He pursues her after taking an interest in her. But while spending time with the honest and untainted Mao, Keita starts to fall for her. However, even then, he can't stop playing around with other girls. The reason: his fragile heart. He doesn't want to experience heartbreak ever again. They are complete opposites, both inside and out. Where can their awkward relationship go from here...?