Kilala Princess, being based on Disney movies, pretty much runs on heartwarming moments.
In the Snow White chapter, it takes place after the happy ending. Snow White still visits the dwarves' cottage, however, because it's a special place for her where she made friends.
Upon hearing "friends", Kilala becomes worried over Erica and begins to cry, so Snow White gives her a hug and makes a pie to cheer her up.
In the Ariel chapter, it takes place before Ariel met Eric. She asks Kilala what love is, learns from her, and near the end Ariel sings a song about love.
In the Cinderella chapter, Kilala had been rejected from a princess contest for not knowing etiquette, so Cinderella takes time out from her busy day to teach her. Kilala and her friends help her with the chores.
In the Beauty and the Beast chapter, Kilala and Sylphy put aside their differences to help find a watch the Beast wanted to give Belle.
In the Sleeping Beauty chapter, Aurora reminds Kilala that when she and Philip met, they didn't know each others' class or status, and it didn't matter because they loved each other.
In the Aladdin chapter, the Sultan tells Jasmine to give Kilala a diamond as proof of her being her first friend. When Kilala gives it back out of kindness, Jasmine gives her a more personal gift, the flower from her hair.
At the end of the manga, Sylphy admits defeat to Kilala in regards to Rei, and is last seen being Kilala's maid of honor at the wedding.