You must apply sunscreen even on cloudy days!

It is raining heavily, perhaps because the typhoon's effects are starting today.

I used to think that I didn't need to apply sunscreen on cloudy days.

I don't know why, but during a general education class, the professor

You said I don't need to wear sunscreen on cloudy days.

I guess that somehow stuck in my memory lol

Even as a liberal arts professor, he possessed specialized knowledge regarding ultraviolet rays

It's not like you even have it.

But looking at the Unpa posts, I noticed that everyone applies sunscreen even on cloudy days.

So, I looked into this and found

In fact, ultraviolet rays can pass through clouds and windows, so

I heard you should apply sunscreen even on cloudy days haha.