In the clip shown below, 아이유 and her manager are about to board an airplane in Japan, when 아이유 turns around at the repetitive squeals, "Oppa," "OPPA," "Oppa!"

With a smile, 아이유 tells her manager about his doting 팬 and has him waving back at them. After the chorus of "oppa"-squeals passes, 팬 resume with calling on IU, which 아이유 returns with a cheerful wave of her own.

IU's manager is so cute and endearing to 팬 with his good looks and constant meong (indifferent) expressions, it seems that there are times he even steals the spotlight from IU. Nicknamed as the "chipmunk ahjusshi" 의해 some, manager oppa has 팬 swooning with his Bieber-fluffy hairdo in picture after picture.

Manager oppa also has a close relationship with 아이유 that spawn gif-worthy moments, such as his bodyguard attempts and her shows of aegyo.

link