K's secret
Uke is a half vampire and keeping it a secret. Must sleep with others as life source but refuses to. Seme's life force isn't enough for uke and he ends up very sick.
Hold Me Safe/Holding room
@ Ch 5 Uke hires bodyguard seme because he is being stalked.
At the End of the Road
Uke dies and ends up in a weaker body of someone who committed suicide. Seme is OG uke's childhood friend and knows the person who committed suicide to be the uke because of the sudden change of personality. Helps uke out and knows of his identity. Seme also heir to wealthy businessman thay adopted him in the past which separated the uke and him.
Stockholm syndrome
Seme and uke are roommates. Seme finds tape of uke sleeping with nother guy and blackmails him with it. Uke is also wealthy.
Profundis
Uke is a guide and catches eye of seme. Seme is leader of an organization and never had a high match rate with a guide until he met uke. Offers to save uke's brother in return for becoming the guide for his team. Multiple tops on his team who has uke guide them.
Lost in the Cloud
@ch 10 Uke likes another guy in photo club and secret took pictures of him. Seme is the guy's friend and ends up taking all the photos and uses it to blackmail uke. Seme likes uke and uses this as leverage.
Your Devotion is My Salvation