Gokinjo JK Isezaki-san wa Isekaigaeri no DaiseijoGokinjo JK Isezaki-san wa Isekai-gaeri no Dai Seijo; ご近所ＪＫ伊勢崎さんは異世界帰りの大聖女; The Neighborhood High School Girl, Miss Isezaki, Is the Great Saintess Returned from Another World

One day, the 30-year-old office worker, Koutarou Matsunaga, is stabbed by a thug while protecting Seina Isezaki, a high school girl who lives nearby. And just as Matsunagas life is about to end, he is revived from near-fatal wounds by Seinas power. But his relief is short-lived, as Matsunagas newly awakened power suddenly goes out of control, and the two are transferred to another world. One of swords and magic, where Seina once lived as a Great Saintess. However, Seina, who was once reliable, can no longer produce magic power, and can only manifest holy magic through Matsunagas supply of mana. As they continue on, Seinas feelings for Matsunaga, which she had kept hidden, escalate more and more!? Eventually, Matsunaga awakens to time-space magic, allowing him to freely transfer between Earth and the other world. At that moment, Matsunaga thought to himself. "I can live without being an office worker anymore, right?" This is a lively adventure story of a 30-year-old office worker and a high school girl who has a thing for older men, traversing between Earth and another world.