Alex, the 16-year-old eldest son of the Duke’s family in the Kingdom of Arcadia, suddenly regains memories of his past life without any warning. It looks like that his previous self led a lazy and disreputable life. Amidst this, memories from his previous life as a 40-year-old corporate s*ave resurface, causing confusion as he tries to adapt to his current life… His actions appear different from before, leading to various misunderstandings. As a result, he finds himself being pursued by various women. Including his former fiancée, a tsundere princess, an outgoing elf who serves as his personal maid, a kuudere dragon princess who challenges him to duels, and a clumsy, dog-eared girl who he ends up taking care of him… “I can’t stand this harem situation! How did things end up like this?!” And so, his cries of despair continues to echo as he tries to take control of chaotic daily life.