Thunder 3  

Thunder Three, サンダー3

Three students acquire a DVD rumored to create a portal to another universe. However, while they are distracted, Futaba, Pyontarou's sister, is kidnapped by extraterrestrial beings who have invaded that parallel universe. Realizing their cartoonish forms grant them superhuman abilities in this hyper-realistic alternate reality, they embark on a mission to save Futaba.