SUNG3, who is like our family's 'mutation' and 'human vitamin'! In our relatively quiet household, where Dad (SUNG1), Mom (KIM1), and older sister (SUNG2) are all on the quieter side, SUNG3 is truly a source of vitality, brightening the atmosphere with her sparkling charm.

She perfectly plays the role of the family's mood-maker; with her bright and lively personality, she has a special energy that quickly draws everyone around her into a fun, party-like atmosphere. While she follows and adores her older sister SUNG2 more than anyone, she's also an adorable free spirit whose immense curiosity about everything means her sister's logical advice sometimes goes in one ear and out the other.

SUNG3 majored in design in Korea and is quite talented; after graduation, she actively worked as an apparel designer for a world-renowned sports company. Now, however, she has temporarily put her life as a designer aside and, together with her family, is excitedly learning about and experiencing the wider world, with the globe as her stage.

The cheerful adventures of SUNG3, the energetic youngest daughter who injects unpredictable fun and vitality into our quiet family, are continuing throughout our world trip!