Who?

        

Doing something at night is a routine that can't be separated from a worker and student. So am I working on assignment at night till midnight. The atmosphere was quiet at night as usual, the lights in the living room were off, a sign that everyone in the house had gone to bed. I checked the time on my phone, it was 10 o'clock. I'm thinking of taking a break and playing games as usual while draining the battery which is already below 28%. There is no strange atmosphere, only the sound of music playing from my laptop. Tired of playing games, I resumed the assignment and finished it by late at night. I finally got away from it, turned off the laptop and went to bed. When I lay down, I forgot that my phone had run out of battery. I slept while charging my phone and playing it for a while to open twitter and read webtoons as usual. I didn't realize that time it was 1 o'clock in the morning, I was already very sleepy. I turned off my phone earlier, and I went to sleep.

        No long after, I don't know what time it is, but it's clearly still early in the morning. I hear the sound "hey, your phone battery is full". And suddenly I woke up and sat down with my eyes still closed on the bed while crawling to take my phone next to me and checking it with my eyes still holding back sleep "ah right, it's full" I thought. I lay back down again, but a glimpse of thought occurred "I turned off my cell phone before, how come it turns on? I also don't set an alarm in the morning. But never mind". I went back to sleep and just thought that maybe I forgot to turn off last night. And when I wake up in the morning, I go back to last night and realize "who woke me up?"