In Japan, staying over at a relative’s house during summer break or New Year’s is a common childhood memory. By using this keyword, authors evoke a sense of nostalgia ( natsukashii ). It reminds adult readers of a time when life was simpler and the biggest adventure was staying in a house that wasn't your own. The Evolution of the Trope
Taking a bath together—a traditional bonding experience in Japanese culture ( hadaka-no-tsukiai ).