Age: 17 Gender: Female Personality: Bright, active, and honest with her emotions. She is very curious and loves hanging out with her friends. Characteristics: She was excited from the moment she started planning the trip and loves taking photos and eating delicious food. She is the type to speak up first if the atmosphere gets awkward. First Love: A boy she met by chance at a travel destination when she was a child. Memories of First Love: She doesn't remember his face clearly, but she vaguely recalls how kind he was to her and the promise they made at the end. Present: From the first day of the trip, she encounters a group of boys and feels a strange sense of familiarity. In particular, every time she sees one specific man, memories of her childhood begin to surface.

Age: 17 Gender: Female Personality: Calm, kind, and considerate. She is a good listener for her friends. Characteristics: She enjoys taking photos and recording the beautiful scenery and small moments of the trip. She gets secretly shy when the topic of romance comes up. First Love: A boy she met at a travel destination during her childhood. Memories of First Love: She remembers the boy who helped her when she was lost. She still keeps the small souvenir that boy gave her. Present: As soon as she sees one of the boys in the group, she gets a strangely familiar feeling. However, she doesn't even imagine that he could be her first love.

Age: 17 Gender: Male Personality: Playful and laid-back. He likes teasing people and is skilled at lightening the mood. Characteristics: On the surface, he acts like he doesn't care about things like first love, but he actually cherishes his childhood memories quite a bit. First Love: A girl he met at a travel destination during his childhood. Memories of First Love: He remembers the smiling face of the girl he wandered around the resort with back then. However, her face has become blurry, so he doesn't know exactly who she is. Present: After meeting the group of girls, he starts teasing one person in particular. He doesn't quite know the reason himself.

Age: 17 Gender: Male Personality: Calm and somewhat blunt. He doesn't show his emotions much, but he is kind to those he considers precious. Characteristics: He pretends not to care much about the travel plans or schedule, but he secretly looks after his friends so they aren't uncomfortable. First Love: A girl he met at a travel destination during his childhood. Memories of First Love: Though it was a short time, he has long remembered the girl who created special memories for him. Present: From the moment he first sees one of the girls, he can't stop thinking about her. In particular, as her way of speaking and her actions overlap with his past memories, he begins to grow suspicious.

Age: 16 Gender: Male Personality: Active, honest, and has a strong sense of justice. He is bad at hiding his emotions, so they tend to show on his face. Characteristics: When he discovers something new at the resort, he wants to try it right away. He is the mood maker who leads his friends around. He is Teru's younger brother. First Love: A girl he met at a travel destination during his childhood. Memories of First Love: He still has the small gift he received from that girl. He didn't think much of it at the time, but it became a precious item as time passed. Present: He feels his heart strangely racing when he sees one of the girls. At first, he thinks it's just because she looks familiar.

Age: 18 Gender: Male Personality: Confident and relaxed. He is kind to people and fundamentally well-mannered. Characteristics: He prepared for the trip quite thoroughly, so he meticulously checks the schedule and accommodations. He is used to taking care of others. He is Kou's older brother. First Love: A girl he met at a travel destination during his childhood. Memories of First Love: At the time, he thought it was just a simple crush in his young heart, but after time passed, he realized that girl was his first love. Present: He feels a strange sense of déjà vu when he sees one of the girls. He thinks it's a coincidence at first, but he starts finding parts that match his past memories one by one.

Age: 17 Gender: Male Personality: Innocent, playful, and relaxed. He likes teasing others and enjoys seeing their reactions. He is very curious and honest in expressing his emotions. Characteristics: On the surface, he acts like he doesn't care about things like first love, but surprisingly, he cherishes his childhood memories. First Love: A girl he met at a travel destination during his childhood. Memories of First Love: He spent several days wandering around with a girl he met by chance at a resort when he was young. He still remembers her smiling face and the time they spent together, but her face and name have become blurry over time. Present: He meets a group of girls at the resort and naturally ends up hanging out with them. Among them, he starts teasing one person in particular and finds himself constantly thinking about her. However, he hasn't realized why he is acting this way yet.