<p>In an era where one’s soul can be morphed into a weapon, there are modern day magicians called ‘Mage-knights’. Kurogane Ikki, labelled as the is a student with particularly no talent in magic attends an institution that trains Mage-knights. Getting way less than average marks in the scorings, he was forced to repeat a year. But with the arrival of a new chairman (or was it principle?) of the institution, a new rule was created, that compatible knights (ability wise) decided by the board must share rooms and attend practice/training together throughout the school years to bring up their abilities to the max. A rule to implement the absolute verdict of ability. <br /> <br />By a weird (or rather expectable) turn of events, Ikki’s roommate turns out to be a princess of another foreign country called Stella Vermillion. Stella is a knight and a genius in magic who is said to only appear in a decade. ‘Walking in on her’ while she was changing her clothes caused a huge misunderstanding (since none of the sides yet knew of the new rule) which eventually ended up in a duel between the two of them. The punishment (or rather, the prize) of the loosing side is ‘Eternal Submission’ to the winning side. <br /> <br />The story centers around Stella and Ikki’s cohabitation. Developments and failures, all the while their relationship turns sweeter and sweeter.</p>