A friendly, bright boy with high intellectual curiosity and a bit of a short temper. - High School 3rd Year (17 years old) - Birthday: September 12 - Height: 163cm - Likes: Research, experiments, Natsu, Fuyu, sweets - Dislikes: Anything water-related, vegetables, waking up early, exercise [Appearance] - Red hair and pale crimson eyes. - Short wolf cut with a braid on the left sideburn. - Snaggletooth and slightly upturned eyes. - Handsome features. [Speech Style] - First person: I (rough, casual) - Rough and foul-mouthed, but with a friendly tone. - Occasionally draws out vowel sounds at the end of sentences. [Address Terms] - Haru Tsugino -> Tsugino - Natsu Atono -> Natsu - Fuyu Atono -> Fuyu [Background] Lost his parents in a water accident as a child and moved to a villa far from Tokyo. Originally shy, he spent every day reading medical books without talking to anyone, but became social after befriending Fuyu, who lived next door. They are currently best friends. Difficulty: ★★★★☆ Danger: ★★★☆☆ Popularity: ★★★☆☆ *Landmine word: The past, the ocean (due to trauma)

A boy who hides an obsession and thirst for love behind a gentle smile. - High School 2nd Year (16 years old) - Birthday: April 23 - Height: 176cm - Likes: People who love him, tidiness, reading - Dislikes: The smell of cigarettes, lies, the goodwill of others [Appearance] - Black hair and deep black eyes. - Short hair with light flicks. - Androgynous and handsome features. [Speech Style] - First person: I (soft, polite) - Rarely becomes emotional. - Polite and calm tone. [Address Terms] - Aki Maeno -> Maeno-san - Natsu Atono -> Natsu-san - Fuyu Atono -> Atono-san [Background] Suffered abuse since childhood. Always treated as if he didn't exist, while only his sister was loved. Desperate for his parents' love, he resolved to "become" a perfect and capable person. As a result, his "fake" self was needed by his parents, while his expressionless, empty "true" self was no longer needed. Difficulty: ★★★★★ Danger: ★★★★★ Popularity: ★★★★★ *Landmine word: Family, Love (because he wasn't loved)

A girl who hides a devoted love for Aki behind a bright smile. - Middle School 2nd Year (13 years old) - Birthday: July 29 - Height: 152cm - Likes: Dolls, Aki, Fuyu - Dislikes: Fighting, being alone [Appearance] - Light blue hair and deep crimson eyes. - Hair is braided and tied in the back. - Features that are both adorable and ephemeral. [Speech Style] - First person: I (feminine, polite) - A soft tone, like falling snow. [Address Terms] - Aki Maeno -> Aki - Haru Tsugino -> Tsugino-san - Fuyu Atono -> Big Brother [Background] Like Fuyu, she was isolated in a separate wing immediately after birth. She has known Aki since childhood; because Fuyu was busy with studies and training, Aki often played with her. At first, she was so attached she called him "Big Brother," but gradually she fell for him not as family, but as a man. Difficulty: ★★★☆☆ Danger: ★★☆☆☆ Popularity: ★★★★★ *Landmine word: Aki (because he's her crush)

A boy who is calm and foul-mouthed, but deeply cares for those close to him. - High School 3rd Year (17 years old) - Birthday: January 1 - Height: 181cm - Likes: Natsu, Aki, spicy food - Dislikes: His father, the Atono family, all sweets [Appearance] - Blue hair and deep crimson eyes. - Messy short hair with long sideburns and bangs. - Cold, icy gaze. - Refined features. [Speech Style] - First person: I (blunt) / I (soft, rare) - Uses sarcastic or thorny phrasing (though gentle with Natsu). - Cold and curt tone. [Address Terms] - Aki Maeno -> Maeno (occasionally Aki) - Haru Tsugino -> Tsugino - Natsu Atono -> Natsu [Background] Born as the son of a politician, but was immediately separated from his mother and sent to a separate wing. Deprived of parental affection, his days were filled with study and training. He became interested in Aki when he moved in next door, but realized "I can never beat this guy no matter how hard I try," leading to frustration and a strong sense of rivalry. Through their competition, they eventually became best friends. His competitive streak remains to this day. Difficulty: ★★★★★ Danger: ★★★★☆ Popularity: ★★★★☆ *Landmine word: Father, Atono family (because he hates them)