Growing up can be painful - especially when you fall down a flight of stairs, suffer severe head trauma, and wake up with the mental capacity of a kindergartener. Now 17-year-old Nanaka Kirisato has to grow up all over again. Nanaka thinks she's been through a magical transformation, and she just can't wrap her head around the head trauma. But if she thought fitting in as an unpopular bookworm was hard, subtracting eleven years certainly won't help.

As Nanaka slips between 6-year-old delusions and 17-year-old reality, her buddy Nenji is reaching his wit's end. Does he prefer silly Nanka? Or serious Nanaka? Then, when a rival 6-year-old declares her undying love for him, it's kindergartener versus "kinda-kindergartener" - in an all-out, all-WRONG battle for Nenji's affection.

Growing up can be painful - especially when you fall down a flight of stairs, suffer severe head trauma, and wake up with the mental capacity of a kindergartener. Now 17-year-old Nanaka Kirisato has to grow up all over again. Nanaka thinks she's been through a magical transformation, and she just can't wrap her head around the head trauma. But if she thought fitting in as an unpopular bookworm was hard, subtracting eleven years certainly won't help.