Konna Kawaii Iinazuke ga Iru noni, Hoka no Ko ga Suki nano?

Chris, a super celebrity beautiful girl who claims to be his fiancée, suddenly appears in front of Kouta, a high school student who is poor and works part-time every day. He learned that 10 years ago, Kouta's father, who was blinded by money, had a marriage contract without permission. We will not be at our parent's mercy! The two who hit it off and decided to form an "Engagement Breakup Alliance." However, this was Chris's strategy to turn around her first love partner, Kouta─!! "Kouta will make a lie that you have another fiancée. First of all, you should start by finding someone you like." "Wait, hold up. No need. I could just propose to my current girlfriend!" "...Huuh?! A girlfriend─?!" A love triangle that begins with the cancellation of an engagement?! (Source: Kadokawa, translated)