"I want to make you happy for the rest of your life and not just treat this as a one-night stand," declared the boss to Shirakawa Anzu, a 26-year-old who struggled in love and work due to her serious and independent nature. After a breakup with her boyfriend, she drunkenly slept with her boss, known for being a stubborn modern-day samurai. However, he woke up the next day feeling responsible for her and vowed to make her happy forever. This love story defies convention as it follows the unusual progression between a heartbroken girl and her samurai boss.