While Akane, whose SRG Value ​​does not match, is filled with guilt, Taisei and Ryota are also worried about Akane, who has been going to the Track-and-field Club more often. Furthermore, when they hear Akane say that he is leaning more towards track and field, the relationship between the three becomes strained. Meanwhile, a mysterious enemy suddenly appears - "Hades Shinkalion". Taisei and his friends are forced to struggle against its overwhelming strength, and try out the Three Car Combination as their last hope...