@peren.all thankyou, I've searched for it online, and it does look the same :D

You are very welcome. Interesting plant!

I know, and it's my first time having a succulent. It seems like they're withering, what can I do? I've read that cactus doesn't need so much watering, I only sprayed some water.

Where are you located? Are you planning to grow this as a houseplant or out-of-doors? I mostly find references to it being grown outside, but everything I read says sun to light shade and well-drained soil. So if you are growing it inside, find the sunniest window possible (indoor sun is far less bright than outdoor sun) where it will stay relatively cool. Give it minimal water as it's easiest to kill with too much water, especially in winter. If it's in regular potting soil, give it cactus soil instead. Here's one link to info and care.

SouthEast Asia, Equatorial climate, about 33 degree Celsius during the day and about 28 degree Celsius in the evening. Initially, I put it outside during the day and indoor in the evening, then I've read it somewhere it should be kept in one condition only because they need to adapt to their environment. So I kept it outside now. Don't really know about winter because here basically the coldest day is when the raining season came, about 22 degree Celsius in the evening. The hottest day is during drought season, about 38 degree. It rain just a few hours ago, it hasn't rain for about a week or two.