Life at school is quite difficult, but when students are forced to participate in a harsh struggle to determine their social standing and subsequent treatment, the rules change. Karino's older stepbrother, Tatsumi, is a proper student with values, diligently following the path set for him by others. However, when he unexpectedly falls in love with the eccentric Senzaki, he takes an unexpected turn, securing the position of an outlaw for himself without moral constraints. Senzaki accepts Tatsumi's feelings with nonchalance, expecting to do the same himself. But is Tatsumi willing to carve a new path to stay close to the impulsive Senzaki?