I'm not entirely sure what 'ki' means in this context. 'New love' is self - explanatory, it refers to a fresh or newly - formed romantic relationship. 'Old story' could imply something that has happened before in the context of relationships, like an old pattern or a past experience that might be related to the new love.
Sure. Let's say a girl starts a new relationship. Her family has an old story of how her grandparents fell in love during a difficult time. The values and the way her grandparents overcame difficulties in their relationship influence her new love. So the old family love story is related to her new love.
One can start by reflecting on the old love. Recall the good and bad times, and then find ways to bring in new elements. For example, if it was a long - distance old love, now try to be closer.
Naruto could potentially have the ability to create ki - based shields. These shields could protect him from various attacks, whether they are physical or energy - based. Another new ability could be ki - infused clones. Instead of just normal clones made of chakra, these clones would have an added ki element, making them stronger and more durable. He might also be able to use ki to heal himself faster, similar to how some characters in other stories use life - force energy for regeneration.
Another theme might be change. The lockdown itself is a big change, and a new entry in the love story could represent how the characters are changing and adapting in this new situation. For instance, if a new person enters the love story, the existing characters may have to change their ways of thinking or behaving in the relationship.
As I don't have enough information, I can't determine who Mami Ki is in the story. It could be a main character, a supporting character, or even a name given in a metaphorical sense.