Masochist Reader's manga / #Mystery(3)

After reading Moritones, Koisuru Psycho no Shirayuki-kun, Etc. Then reading this story, I was a little disappointed with the depiction of uke's character. I don't blame this author, the story is good and interesting, unfortunately I don't really like the character of the uke who easily breaks up and changes Lover. 20+ ex-boyfriends. I came here looking for a story with Yandere seme, insane seme, but on the other hand it doesn't depict such cheap uke characters.