Dragon actor Pradeep Ranganathan accidentally let out the secret about his co-star Kayadu Lohar's PR game. The two recently had a release with director Ashwath Marimuthu's Dragon, which has received overwhelming reviews from critics and audiences alike. As they interchanged their phones, a hat-tip to the theme of Pradeep Ranganathan's directorial venture, Love Today, they began searching for secrets. Kayadu …