Need my dose of yuri

[HeyJudas]

Any reccomendation for ntr/cheating/corruption yuri manga? For example my girlfriend is not here today.

 

[Justice88]

 

[Manko-sensei]

Try FLOWERCHILD works or Mira, they are pretty cannon. Black Lily to Shirayuri-chan is similar to some of their works. Shiratama Moti also has works about stealing or competing over others girlfriends, like the Succubus one. A different story would be if you asked about yuri harems.
PS: also check Shichoson doujinshi, more for the part of corruption.