In these days it is very cold.
I don't know this coldness is within the normal range in Saitama
because of the first winter for me spending in Saitama, it's just, it is very cold.
Therefore, although I don't usually use air conditioner, I slept with the air conditioner on.
It just bring me a good night's sleep.
However, because warming a room by air cnditioner make a room dry,
when I wake up, I have a sore throat.
And I am worried I might catche a cold.
This winter I have caught a cold once, and experienced the suffering of the cold.
So, I never want to catche a cold.