A lifelong love of flight inspires Japanese aviation engineer Jiro Horikoshi, whose storied career includes the creation of the A-6M World War II fighter plane.

新学期刚开始，高中生·坂井悠二一如往常过着“日常生活”。然而有一天，他冷不防遭遇红世之王手下的侵袭。受到一名能够把人的存在化为灵火，并吸取灵火的神秘男子法利亚格尼的攻击。悠二的“日常”生活因此整个脱节，然而就在同一时间，一名少女出现在他面前。
少女为了保护悠二不被法利亚格尼袭击，开始与悠二一同生活。悠二满怀感激向少女道谢，不料少女却如此低喃：“你已经不存在了。”
我已经死了？存在丧失者·悠二为何还能够思考呢……

OVA的故事紧接着TV第13话，也就是被定性为13.5话，夏娜和吉田同学总因为某些小事而吵吵闹闹，就在这样的吵架拌嘴中，两人还是和悠二一起去校外踏青，在围绕着争夺悠二的争吵中，他们之中会有新的恋情爆发吗？　　这部OVA只不过是剧场版上映前的一道杀必死小点心罢了，没有和红世之徒的激斗，也不会有人有生命危险，如果硬要扯上战斗的话，那么悠二同学如果不想受到任何一方责难的话，还是在巨乳和贫乳中好好做出选择吧，最可怕的还是女人的怨念啊！

Shana and Alastor — the Lord of the Crimson Realm — continue to do battle with the Guze no Tomogaras, who are trying to steal the Power of Existence from mortals. In the last battle, Yūji is revealed to be a mystes, a torch with nearly unlimited Power of Existence. Since the Tomogaras want to capture Yūji and use him to upset the balance of the Realm, Shana resolves to protect Yūji. Yūji then vows to join Shana in her fight.

The world has become a slaughtering ground for the Crimson Denizens, mysterious beings from a parallel universe who thrive on the life energy of humans. These merciless murderers only leave behind scant remainders of souls called "Torches," which are mere residues that will eventually be destroyed, along with the very fact of the victims' existence from the minds of the living. In an ambitious endeavor to put an end to this invisible, hungry massacre, warriors called Flame Hazes relentlessly fight these monsters.

One fateful day, Yuuji Sakai ceases to be a regular high schooler—he becomes trapped in a crevice of time and is suddenly attacked by a Denizen. Coming to his rescue just in the nick of time is a nameless hunter who seems no different from an ordinary young girl except for her blazing eyes and burning crimson hair. However, before Yuuji can learn anything more about his situation, he discovers that he has already been reduced to a Torch—merely a scrap of memory waiting to be extinguished.

Yuji and Shana's class go on a trip to see various temples and shrines, followed by a trip to a hot springs resort.

闹得沸沸扬扬的《灼眼的夏娜S》新企画，在电击文库MAGAZINE7月号终于公布了事件的真相——《灼眼的夏娜S》将在年底推出新作动画OVA，并在近日告知了OVA系列总共将制作4卷，且蓝光与DVD同期发售的消息，制作团队依然由J.C.STAFF的渡部高志班负责，当然，既然是OVA原作补完之类的完全不可能出现。故事描述的是夏娜与悠二因宝具的效果而导致精神互换的番外篇，DVD与蓝光第一卷将于2009年10月23日开始发售，售价分别是5,775日元、6,825日元。比起TV动画第一季的OVA，本期OVA的欢乐指数明显不及格