Nakamoto Keisuke, the mightiest Hero ever known, found himself whisked away to a parallel realm at the tender age of fifteen. By the time he vanquished The Demon King, he had aged to thirty-two. Returning to Japan after fulfilling his destiny, he faced a harsh reality: labeled a middle school dropout with seventeen years of unaccounted time. Struggling to secure stable employment, he drifted through menial part-time jobs. Just when life seemed bleak, a self-proclaimed beauty named Angelica surfaced, claiming to be his reward for defeating the Demon King. Hailing from another world, she relentlessly pursued Nakamoto, urging him to take her as his wife. Alongside a high school girl resembling his lost love Elsa from his previous adventure, Nakamoto, armed with his exceptional abilities, stumbled into a chaotic harem existence.