Konna Kawaii Iinazuke ga Iru no ni, Hoka no Ko ga Suki na no?

A high school student named Kouta, who works part-time and has no money, is suddenly approached by Chris, a famous and beautiful celebrity who claims to be his fiancée. Ten years earlier, Kouta’s father, driven by greed, made a secret marriage contract without his knowledge. Determined not to be controlled by their parents, Kouta and Chris form an "Engagement Breakup Alliance." However, this is part of Chris’s plan to win Kouta back as her first love. She suggests Kouta pretend to have another fiancée to help break the contract. When Kouta reveals he already has a girlfriend, Chris is shocked. This sets off a love triangle as the engagement begins to unravel.