Sorry, I Want To Break Up... An Obedience "Mistress" Contract With A Boyfriend Who Refuses To Break Up - Suzume Mino

A sudden breakup proposed by my beloved girlfriend. "No! I absolutely don't want to break up! Then I'll be your [lover]!" When I begged desperately, she suddenly changed and said, "Then show me your masturbation right now." After I came as told, she next forced me to watch her having sex with her "new boyfriend." I got an erection while feeling jealous of my girlfriend, who I was seeing as lewd for the first time. What was supposed to be a lover contract turned into me being trained into an obedient male dog...