Panty Panic

On December 21, Yūta Iridatsu is caught up in a bus hijacking along with his neighbour Rabura Chichibu, at which point super heroine Strange Juice comes to save the day. Rabura is knocked out by the mastermind who is about to shoot Strange Juice, but hesitates when he sees a pink "G" on her neck. When Yūta sees Rabura's panties, he powers up and tackles the mastermind out into the sea. He wakes up on the shore with Strange Juice, and upon seeing her panties, falls unconscious again and powers down, at which point something falls from the sky, forcing his soul out of his body. He reawakens in his apartment building two days later, with a spirit cat, Chiranosuke, who explains that another spirit is inhabiting his body and he must find the "Nandala Gandala" book to take back his body. While Yūta searches for the book in his apartment building, he learns that when he sees girls panties twice in a row, he loses consciousness and a meteor destroys earth. Luckily, he also learns that he can go back in time and re-do the situation in his spirit form, as well as manipulate objects to a small extent. Later, Yūta learns that his neighbour, Mikatan Narugino, is Strange Juice.