Harenochi Shikibu (it's a slowburn in a different way, you'll see it when you read it (≧▽≦)!)For Your Love (the smut is only on the extra so you can avoid it)The Story of You x MeKoimonogatari19 Days7 Day... murasaki_likesfluff
Speaking of hs BL, I should probably create a list. Maybe I can post the link here~
High school bl thats a slowburn preferably no smut (⌒▽⌒)