Sunako needs to be tutored in math, since failure to do so will cause the rent to increase. Kyohei dresses up as a nerd and studies hard to teach Sunako not to run away from her issues, however this causes an uproar among the female students.While doing so Sunako remembers the incident that she kissed a radiant being (Kyouhei) which causes her to react badly. Later Kyouhei makes her understand that a passion-less kiss is nothing.Unfortunately, Sunako still failed the exam due to putting the right answers in the wrong math problems.