9 Border

Both dramas have a set of girls finding love, searching for a meaning in life, and trying to settle down the best way possible. Both have fun and warm girls' talks, and the dialogues between characters are wel! They have a similar slice-of-life kinda style while each drama maintains its own unique vibe. Tokyo Trareba is more chaotic/energetic, while 9-border has a fluffier and softer vibe.

the age dynamics of the siblings are the same
9-19-29-39

in 9 border it narrates life of 3 sisters. in plus nine boys, it shows the lives of brothers with a superstition of age ending in 9.

Both Our Little Sister and 9 Border explore sisterhood but from different angles. Our Little Sister presents a warm, gentle look at family bonds and everyday life, while 9 Border focuses on adult sisters dealing with career, relationships, and family pressures. Each offers a unique perspective on sisterly relationships and personal growth.