The rich bully the poor, favor one over the other, fear the strong bully the weak
Opposite: treat everyone equally, be impartial, be neither servile nor overbearing
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One challenge is cultural differences. For example, different holidays and how to celebrate them. Another is family acceptance. Families may have certain expectations that the couple has to face.
In fanfiction, Naruto might fear a shinobi for various reasons. One could be that the shinobi has a unique and powerful jutsu that Naruto has never encountered before. For example, a shinobi with the ability to manipulate time could be extremely intimidating to Naruto as it goes against his understanding of combat and the ninja world. This new and unknown power could make him feel vulnerable.
The synonymous words of bullying the weak and fearing the strong were: to speak out and be gentle, to bully the good and be afraid of the evil, to favor one over the other, to bully others with power, to be gentle and unyielding, to be afraid of the strong and bully the weak, to be rich and bully the poor, to be timid and bully the small, to take advantage of the high and step on the low, and to be afraid of the strong and bully the weak.
One highlight is their unity as a group. Despite any differences they might have had over the years, they always presented a united front on stage and in their music. Another is their ability to constantly reinvent their sound. This kept their fans interested and in love with their music. For example, when they moved from their more bubblegum pop beginnings to a more mature sound with elements of R&B and hip - hop.
One common element is the presence of unique characters. For example, in stories like 'My Love from the Star', having an alien as one of the main characters makes it different from ordinary love stories. Another element is the strong emotional connection. In Korean mix love stories, the characters often have a deep and passionate bond that goes through various challenges.