After they fell in love with each other, they started going to real dates and sharing a lot of small things. Once, in their high school, they got a volunteer program in which Lara Jean chooses to go to Belleview Retirement Home because her older sister went. While his boyfriend decides to volunteer with his friends.
When she went there, she gets to know that John Ambrose McClaren is also volunteering at Belleview. He was one of the five to whom she had written a love letter. Later, he discussed the letter and also agrees to let her read that letter. When she read the letter, she was unable to stop thinking along with this she was insecure about her relationship because of his ex-girlfriend. On Valentine’s Day, every group was coming in every period to make their girlfriend feel special, and she got to know that Peter did this same for his ex-girlfriend, listening to this her insecurity increased more. Afterward, she forgot her insecurity when Peter gifted her Silver necklace and reads a poem for her.
During volunteering, Lara Jean and John Ambrose become closer while working in Belleview. John Ambrose started feeling for Lara but she can’t able to tell him that she is already in a relationship with Peter. Rather, she told him that a treehouse, where they used to hang out in olden days, is now being pulled down by the new family. So they decided to party, and meet all the old friends. While they met for the party, Peter got jealous of John and divulges his relationship with Lara.
Slowly their relationship was fading, and one day they had a breakup because she saw a photo of Peter and his ex-girlfriend was standing closer also Peter was holding her hand. Further, the story revolves around how they make up again and how John realizes that Lara seriously doesn’t in love with him.