With Takumu's support, Haruyuki is now dueling one after another in Brain Burst and soon reaches the second level. However, his joy is short-lived, as he has almost completely used up all his Burst Points in one go during the level-up! Following Takumu's advice, he hires a legendary bodyguard, but can he fully trust him? Shortly after, the next adventure is already at his doorstep, taking the form of a girl who claims to be his relative and wants to stay with him for a few days. Something seems off, doesn't it?.