MC(s) with angsty/traumatic past

Spin off of Akai Ito No Shikkou Yuuyo
Uke can see red string of fate and cut them. But because of that ability, he doesn't have his own red string and doesn't want to commit to any relationship because he knows they will eventually leave to meet their fated one. One day, he helps his future seme. Seme fell in love with uke, and whats to continue a relationship with uke but instead the uke offers to be sex friends.

Uke was traumatized by his childhood sexual harrasment. When seme accidentally touches him, he was reminded by it but also didn't hated it. Uke is currently working part-time for seme.

Because of past trauma (ganged raped bc of his ex boyfriend), uke becomes unable to stand men’s smells, won’t take off his mask even during sex, causing his sex friends to be fed up and leave him. Then he has a one night stand but gets a whiff of the guy and runs, but meets that very same guy at an incense store.

Story is rushed but what can you do about it. But what pissed me off was the attempt of slight redemption for the ex boyfriend. Like nah bitch can burn in hell

Seme has Dissociative Identity Disorder (DID).

Kyosumi lives with his late best friend's younger brother, Hibari. He looks after Hibari as he feels responsible for the death of his best friend. Kyosumi has sworn an oath to be Hibari's family, after he had lost his only blood relative. However, Hibari has feelings for Kyosumi.

At the end of high school, Maki (seme) who is gay confessed to his then bestfriend Katsumi (uke), who rejected him and replied “disgusting." Now they have reunited after 10 years of being apart. Maki finds out that Katsumi have been sleeping around with men to self-inflict the pain he cause to Maki during the time he rejected him.
The pain is strong with this one!

A child therion (animals with human-like features) named Lyco was abused but is saved and taken into the new home of the caring Yuto. Lyco does his best to heal from the trauma and grows up to fall in love with Yuto.
This is a (adoptive) father x son story so if that bothers you don't read. But they are pretty cute.

Uke not waiting to disappoint his adoptive family suppresses his feelings for his male childhood friend.

Slutty uke meets angry seme. Both with issues.
I cried a lot for the uke who gets raped a lot throughout the story (never by the seme). But *spoiler* it's a happy ending. Though it a rollercoaster to get there.

Uke was heartbroken by an asshole. Typical straight asshole who had sex with uke because curious and convenient then says he's getting married. But then the uke has a chance encounter with a sweet seme. Seriously seme is so gentlemanly and caring!