Oda Shuuhei, a high school student, acquired Hero Skills in another world, defeated the Demon Lord he was supposed to vanquish, and returned to Japan. As he enjoys his school life using his Hero Skills, Hasumi Kana, the most beautiful girl in the school who sits next to him, tells him, “I took an interest in you, Shuuhei-kun, whose atmosphere suddenly changed” and they end up becoming class representatives together. As the season for the school’s cultural festival approaches, Shuuhei and Kana are busy with preparing for their class’s exhibit, crafting cosplay costumes, and other preparations. As the time they spend alone increases, Kana begins to be attracted to Shuuhei, who can do anything perfectly, and slowly but surely, the emotional distance between them starts to close. It’s a sweet yet intense high school romantic comedy that starts over with Hero Skills and a steel-strong mentality.