在席卷全世界的死斗链环傀儡结束后数日。 世界恢复和平，安稳的日常生活再度到来。 但是，令人惊愕的事态却发生在棹俊树面前。 从链环傀儡的侵略之下拯救了世界的英雄、先导爱知，忽然从这个世界上消失了。并且，人们也失去了有关爱知曾经存在的记忆…… 在几乎没有任何线索的情况下，棹将仅余的能够证明大家与爱知的牵绊的「狂风剑刃」与《光辉骑士团》卡组握在手中，出发前去探索爱知。 这般情况下，棹的面前出现了自称「四骑士（Quatre Knights）」的斗士们。盖亚尔、涅文、拉缇、瑟勒——这4人中不论哪一个都是世界顶尖水准的先导者斗士。 操控着不可思议的力量的他们，宣告要让棹放弃寻找爱知。 他们的目的究竟是……！？而他们和爱知又是什么关系……！？ 将全新的力量「双斗」纳入手中，夺回爱知的战斗，现在开始！
OVA『情色漫画老师』2019年1月16日发售 收录2话 ■ 山田妖精的情歌 ■ 和泉纱雾的初吻
Tomoya Mikami's life changed one day when his girlfriend Ayaka was hit by a car and killed on her way to meet Tomoya. He blamed himself for her death and never was the same after the accident. He began acting callously towards Yue and his other friends. Furthermore, every time Tomoya gets involved with a new girl, he sees images of Ayaka in his dreams. He decides he needs to find a way to say goodbye to his lost love once and for all, while dealing with several side romances at the same time.
