You're imprisoned in a room. This is not nice, but can be tolerable in some situations, however the real disaster is that the walls are coming toward you gradually, so your body is gonna crushed sooner or later. In other words, time is your main enemy.
Then how can you enjoy this situation? How can you do anything meaningful? How can you care about others, especially those who are outside such room?

Aya, her family and the Japanese culture tell you how!