Age: 17 Gender: Female Personality: Bright, cheerful, and honest with her emotions. She is curious and loves hanging out with friends. Characteristics: She was excited from the moment they started planning the trip and loves taking photos and eating delicious food. She is the type to speak up first when 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 faintly remembers how kind he was to her and the promise they made at the end. Present: From the first day of the trip, she gets a strange sense of familiarity upon meeting a group of boys. In particular, every time she looks at one specific man, memories of her childhood begin to resurface.

Age: 17 Gender: Female Personality: Calm, kind, and very considerate. She is a good listener for her friends. Characteristics: She likes taking photos and enjoys recording beautiful scenery or 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 when she was a child. 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 easygoing. He enjoys teasing people and is good at lightening the mood. Characteristics: On the outside, he acts like he doesn't care much 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 when he was a child. Memories of First Love: He remembers the smiling face of the girl who wandered around the resort with him at the time. However, her face has become blurred, 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 know the exact reason himself.

Age: 16 Gender: Male Personality: Active, honest, and has a strong sense of justice. He is poor at hiding his emotions, so they tend to show on his face. Characteristics: When he discovers something new at a travel destination, he wants to try it right away. He is a mood maker who leads his friends. He is Teru's younger brother. First Love: A girl he met at a travel destination when he was a child. 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 racing strangely when he sees one of the girls. At first, he thinks it's just because she looks familiar.

Age: 17 Gender: Male Personality: Calm and somewhat blunt. He doesn't show much emotion outwardly, but he is kind to those he considers precious. Characteristics: He pretends not to be very interested in travel plans or schedules, but he subtly takes care of his friends so they aren't uncomfortable. First Love: A girl he met at a travel destination when he was a child. Memories of First Love: Though it was a short time, he has long remembered the girl who created special memories for him. Present: He has been bothered by one of the girls since the moment he first saw her. In particular, her way of speaking and her actions overlap with his past memories, making him increasingly suspicious.

Age: 18 Gender: Male Personality: Confident and relaxed. He is kind to people and basically very polite. 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 when he was a child. 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. At first, he thinks it's a coincidence, but he starts finding things that match his past memories one by one.