After their home is destroyed, Nasa and Tsukasa Yuzaki take refuge at the Arisugawa bathhouse. In their short marriage, their bond grows stronger each day. Nasa is determined to cherish every moment with his beloved wife. Together, they embark on new adventures like adopting a cat, visiting an amusement park, and enjoying unexpected romantic comedies. While Tsukasa integrates into Nasa's world, he longs to uncover the secrets of her past by meeting her elusive family. Despite their idyllic facade, Nasa questions if he will ever unravel the enigma of his wife's background.