grumpy × sunshine Professor × Student Rehan Arora A billionaire maths professor . Grumpy , cold , also a underground mafia . Chose teaching because of his passion belongs to a loving family . In love with his student . Rashi Tyagi A sunshine girl . Bsc maths hons student always loved by her family . Hates her maths professor Cuz he always targets her but deep down having feelings for him . What will happen when they both will confess to each other ? Will they end up together ?