One is a Film and other a Drama but both has similar vibes.
Both our leads meet in school, become each other's First Love, date for a while untill they become adults. Then break-up (in very similar way of how Mains in OBC broke-up) and one day the ML receives Wedding Invitation from the FL.

The film also has flashbacks showing....
How they met, fell in love, then where things went awry and how they broke-up. The film has a lot of similarities with OBC.
Both Leads start as young high schoolers with totally polar personalities, always getting in fights get but falling in love. They get more mature and end up understanding each other after reminiscing their past just like OBC.
BUT Beware the ending is not like OBC. It may seem a sad ending to some.