Bitter na Kokuin

From : Tcmanga The progotanist wants to help her brother to pass his relief assignment successfully (Her brother is a relief teacher teaching at her school). She is willing to offer body to one of the most notorious boy in school for three weeks. The deal is for him to be a good student during his brother tenure. At time passes, she realised this boy is very gentle and lonely without herself noticing it..she actually fell in love with him...