The near future, in a quiet seaside town. Yoshioka, who had recently lost his wife, just wants to spend the rest of his days in peace. However, Yoshioka's children, worried about their father's health, sent a housekeeping robot to help him. Yoshioka's quiet life is now changing.

Koishigawa Akane is a cute, stylish gyaru with gray hair. But she's got a glare that gives a bad impression to most of her classmates, who now keep their distance. Nishimura Chika is the only one kind to her.

The story of three guys and their encounter with a female exhibitionist who rides a Ducati around town naked.

Heartthrob is going to save the world?! From a life-size high school girl, a new girl of the century has finally appeared. Mitsushima Hikaru (15) is a run-of-the-mill freshman who holds an unrequited love towards her senpai (a sophomore) from the astronomy club. But one day, after she makes a wish upon a falling star, she becomes fused with the star (alien) for some reason. Hence, she obtains the strange ability to grow into a giant. That is when Hikaru's life goes for a complete change, as she begins to do battle as a giant heroine...!

Kiryuin Hanao is the idol of her school and her childhood friend Takezou is always by her side, helping her throughout her activities. But when she suddenly becomes a giantess, she is forced to return to her old ways in order to protect her city and friends.