Ewha Centennial Library held Sleepless in Library “One Night Two Days” from May 27 to 28. It was the first library program at Ewha to be held overnight. The event began at 9 p.m. on May 27 and ended at 6 a.m. on the following day. During the warm-up activity of Sleepless in Library "One Night Two Days," students are actively participating in quizzes to receive various prizes. Photo by Kim Kyung-..