Introduction of male protagonist's band

It's an idol-fan love story who are the secret couple. The female protagonist (Riya) is an Indian whereas the male protagonist (Seo-Joon) is a Korean. Joon is a singer in a k-pop band. Riya is a fashion designer, who is a huge fan of his band. Coincidentally they get to meet, they work together and Joon secretly fall in love with her. Joon confesses to her, they get married immediately and they live as a secret married couple. Do they face many circumstances? Will they be able to keep their couple a secret? Why did they marry just after the confession?