Ponkotsu ga Tensei Shitara Zongai Saikyou

Shouta Kanda is a typical sixteen-year-old in her first year of high school. His big-chested but bashful pal Kana Funami and his attractive but useless childhood friend Sanae Kondou are physically slain by Sanae's strength on their way to school. They awaken in a different world with unbelievable abilities: Kana's now-magic chest heals all of their wounds, Shouta's world-class defense against slaps becomes world-class defense against demons, and Sanae? Her power has transformed into something quite terrifying. Will the three be able to survive in this unfamiliar new planet and eventually return to their own?