; : (anime) :Jun'ichi is the main protagonist of the series and is a second year high school student. He had a reputation of a delinquent in junior high school until his sister, Minato, decided to move in with him. He has a snarky attitude and is often teased by everyone around him, including his teacher. His life takes a drastic turn when Yuuhi Katagiri enters his life. They first meet when he saves her from some delinquents who were bothering her. The following day she is introduced as a transfer student to his class. Due to a misunderstanding, he kisses her in front of the class causing her opinion of Jun'ichi to sour. This is further exacerbated when it turns out that their families have arranged their marriage. Despite this rough start, Jun'ichi finds himself protecting Yuuhi when she is harassed and, as time progresses, their feelings for one another begin to grow even though neither of them will admit it. Throughout the anime series it is hinted that Jun'ichi has romantic feelings for his sister, Minato, but is reluctant to admit this even though he sometimes has fantasies about her. In the final episode, he realizes that he cannot live without Minato and confesses to her. In the manga however, he and Yuuhi end up together, as he also has feelings for her. ; : (PC),
Rie Kugimiya (anime/PS2) :Yuuhi is the main heroine in the series. She is very beautiful, which often causes trouble for her, since it draws unwanted attention from passersby - usually men. One day, when she was being harassed by two men, she was saved by Jun'ichi. The next day she transfers to his school (and his class) hoping meet her fiancé because she heard that he was in this area. Later, after a misunderstanding on Jun'ichi's part, he kisses her in public, causing her to have ill feelings towards him. Throughout the series her feelings for him grow. In the manga she and Jun'ichi end up together. ; : (PC),
Aya Hirano (anime/PS2) :Minato is Jun'ichi's younger sister and attends the same school that he does as a first year high school student. She is capable in all areas of household related work and is proud of it. She also has unique abilities, like listening to the ground to detect the presence of animals, as well as be able to communicate with them. She has feelings for Jun'ichi. She mentions that she was adopted once, but later says it was a joke. In the PC game Minato is blood-related to Jun'ichi but in the PS2 version she is not related to him, and it is implied that she is not blood-related to Jun'ichi in the anime. In the anime version she ends up with Jun'ichi; in the manga however, he doesn't reciprocate her feelings, and ends up with Yuuhi. ; : (PC),
Marina Inoue (anime/PS2) :Tsukasa is a second year student in the same class as Jun'ichi, and is a childhood friend. She is a member of the News club. She has a lively personality and loves to gossip as well as tease Jun'ichi. ; : (PC),
Ryō Hirohashi (anime/PS2) :A first year high school student in the same class as Minato. She has an air of mystery around her, strongly hinted of being an alien, and can be found just about anywhere at the right time. ; : (PC),
Rie Tanaka (anime/PS2) :Mitsuki Shiina is the president of the student council. She is a third year student and very popular among the student body. She likes to use Jun'ichi as her lapdog getting him to do favors for her or perform activities for the student body. ; : (PC),
Erino Hazuki (anime/PS2) :Mikoto is a third year high school student in the same class as Mitsuki. She has an individual route which is not available at the beginning of the PC game. ; : (anime/PS2) :Karen is a second year student that is in the same class as Jun'ichi. She is an original character that was first introduced in
Parallel. She comes from a very rich family like Yuuhi and prides herself on acting like a lady. She becomes best friends with Yuuhi. She eventually admits to falling in love with Jun'ichi. ; : (PC),
Akira Ishida (anime/PS2) :Nishino is Jun'ichi's best friend and is also a second year student in the same class as Jun'ichi. He is full of strange ideas that often get Jun'ichi into trouble, and is very close to Tsukasa being in very much the same line of thinking with her. He is the vice-president of the student council. ; : (PC),
Rikiya Koyama (anime/PS2) :Jun'ichi's teacher. While strict with regards to academics, he has a rather eccentric personality, especially towards Jun'ichi. ; : (PC),
Kaori Fukuhara (anime/PS2) :She is the secretary and treasurer of the student council. ; : (PC),
Ryō Hirohashi (anime/PS2) :She is the younger sister of Nagomi. ; : (PC),
Yū Kobayashi (anime/PS2) ==Development==