It's been about half a decade since I read this one and I remember bits of the manga but can't seem to remember the name.
The mc and ml had a particular way of meeting each other, like they were strangers who had a habit of walking on the white line and grew close because of it. Later, drama happens and at the end of the manga, one of them dies and the other eventually passes away too but when he does, he finds that the other hand been waiting for them all this time.
I'll be really grateful if anyone can help 🙏