Wakeatte, Shinkon desu

Sae, a handsome patissier with a romantic disposition who easily falls for the wrong guy, decides to start a marriage activity on an app to get rid of his history of bad relationships. He meets his first match, a kind and gentle wedding planner named Sakurazuke, and they hit it off so well that they decide to get married on the same day! The two of them had planned to continue their peaceful married life as partners without romantic feelings.. but he empathizes with his work ethic and is soothed by his sincere kindness, and he can't help but fall in love with him. But one day, the gentle and sincere Sakurazuke turns out to be an ex-Yankee who is actually a very active member of the yankee community..? Source : Cmoa