GRUB not showing up

I installed windows10 on Disk C and Kali on Disk D for my ASUS laptop. It runs smoothly previously, showing the grub menu each time I power on my laptop to choose whether I want to boot into Kali or windows.

However, today, when I was using my kali, it hangs and I have to restart my laptop. Then, instead of showing grub, it display the system message of disk scanning and then boot directly into my windows OS. Afterwards, I each time I power on my laptop, it boot directly into the Windows OS. I cannot find my Kali OS nor my grub. I tried to boot into kali from the boot menu, but it always boot into windows 10 and not showing grub.

I have a lot of resources on my kali, how do I get the grub back to work?