Many times, it can end badly. There might be jealousy issues or one person may develop stronger feelings than the other. For example, one friend might start to expect more exclusive attention like a real romantic partner, but the other just wants to keep it casual. This can lead to arguments and the end of the friendship.
Often, they end with the two friends going back to being just normal friends. As they grow up and realize that the benefits part was just a phase.
Often, they end when one person catches feelings and the other doesn't reciprocate. For example, if one starts to want a committed relationship while the other is still happy with the no - strings - attached setup.
In some cases, they simply fizzle out. The initial excitement of the physical relationship wears off, and they both come to the realization that they are better off as just friends. There's no big drama or falling in love, just a mutual understanding that the 'friends with benefits' arrangement isn't working for them anymore and they go back to being regular friends.
Sometimes they end when one of them meets someone else they want a more serious relationship with. So they cut off the friends - with - benefits arrangement to pursue that new relationship.
In many cases, the best friends with benefits story ends because one of them meets someone else they want to be in a serious relationship with. So, they break off the friends - with - benefits arrangement. This can be a bittersweet ending. On one hand, the friendship might survive, but on the other hand, there's a sense of loss from the end of the more intimate aspect of their relationship.
Often, they end when one person catches feelings. For example, if one friend starts to want more than just the physical aspect of the relationship and the other doesn't, it can lead to a break - up. So, it can end with some heartache.
Another way they can end is by both friends just growing apart in terms of their sexual attraction. They might find other people they are more interested in, or they simply become too busy with their lives. So they have a conversation about ending the friends - with - benefits arrangement amicably and go their separate ways.
Some end happily, with the couple staying together through high school and even beyond. Maybe they go to the same college and continue their relationship.
Often, they end sadly. High school is a time of change, and sometimes the couple realizes they're growing in different directions. Or external factors like family moving away or new opportunities in different locations force them apart. It's a bittersweet end where they part ways but still cherish the memories.
Often, they end with the main couple getting together. For example, in 'Kaichou wa Maid - sama!', Misaki finally realizes her true feelings for Usui and they end up as a couple.
Some end happily. The bully and the victim fall in love and overcome all the obstacles in their relationship, like dealing with the disapproval of friends or family. They then go on to have a healthy relationship.