In a tuner-exchange partnership, the New York Musical Theater Festival has pacted with South Korea’s Daegu Intl. Musical Festival to present “My Scary Girl” as part of the Gotham event, with perfs scheduled Oct. 1-4 at Theater Row’s Acorn Theater.Scored by Will Aronson with book and lyrics by Kyoung-Ae Kang (based on Son Jae-gon’s film of the same name), the show follows the romantic progress of a naive college professor whose crush may be a serial murderer. The New York Musical Theater Festival presentation will feature the cast of the musical’s commercial run in Seoul. The Daegu fest will also give one of this year’s NYMF shows a full production slot in next year’s edition of the South Korean festival. Winner will be announced at the annual NYMF gala in November.