经历了一番波折，曾经的暗黑系中二深度患者富樫勇太（福山润 配音）终于和现役中二中毒者小鸟游六花（内田真礼 配音）确立了恋爱关系。因妈妈出差和爷爷的失误，六花暂时借住在勇太家中，二人开始实质的同居生活。转眼他们升入了高二，青春气息鄙人的校园内，一色诚（保志总一朗 配音）换了新的发型，丹生谷森夏（赤崎千夏 配音）发誓君临校园，凸守早苗（上坂堇 配音）和阿森的爱憎对决依然继续，变成三年级的“残念生”五月七日茴香（浅仓幸美 配音）则冷感继续。 美好的季节里，好朋友们再度聚首，可爱、有趣、浪漫又感人的故事继续上演……
死神武器职业专门学校，简称“死武专”。其学生分为“工匠”与“武器”。 据称，收集99个鬼神的灵魂与1个魔女的灵魂，“武器”就会进化成最强的死神武器“DEATH SCYTHE” 以最强的“工匠”为目标的镰刀“工匠”玛嘉与其“武器”SOUL二人，开始了艰辛的试炼。有同样目标的还有暗器“工匠”BLACK STAR与“武器”务椿，和死神之子——死神•德•基德与他的武器双枪姐妹。 三组少男少女成长的故事，伴随着的是“死武专”的危机四伏。神秘的魔女美杜莎心怀鬼胎；死神大人不离开“死武专”寸步，似乎也是为了隐藏天大的秘密。
Welcome to a world ravaged by explosions of violence, a world without love. Jung, the broken-hearted hero, pursues his quest: reunite with Maria, his lost love, savagely decapitated by Little Jesus. He can count on the support of allies met along his bloody path, encounters that provide an understanding of others, but especially of himself. He also has to deal with his “violent outbreaks,” an incontrollable curse that springs from his murderous soul.
