I Reincarnated Into a Tragic Romance and Torment Him Like Crazy! He Has It Coming

Heartbreaking Angsty Novels That Will Make You Cry Into Your Pillow at Night

Looking for angst-heavy stories to read, either fan fiction (Slay the Gods, The Prince of Tennis, or The Grave Robbers' Chronicles are all fine) or original works. I want the angst to hit hard from beginning to end and leave my heart aching. I'm a sucker for angst, so bring on the extra brutal stuff.