nana's Favorite

Anyone know this BL?? it's about two boys that purely fell in love with eachother, but it's more than love, a scary one. It's not romantic. Like, they would kill because of that. the genre is phycological. Because they just love eachother too much (like I said, more than love), they just stayed single forever, and not having a physical relationship (yup. No sex at all), and be together forever. Oh, forgot to mention, they're completely straight. I know it's a little bit confusing. I feel like I've read it somewhere.... But I totally forgot! Can anyone help me find this BL?┗( T﹏T )┛