Kento Nanami is madly inlove with his stay at home girlfriend, infact he really wants to marry her. But seeing as hes a sorcerer and puts his life on the line everyday, he fears that one day he might die and leave his girlfriend all by herself, even worse if they do end up having kids, he fears he might never get to meet the kid. So his fears stand in the way of him making his girlfriend of 3 years his wife.