Minato Amamiya (breaking the ice)

Minato Amamiya's other two friends with whom he spends a lot of time at school are Hayato Akahoshi and Daichi Midorikawa. They form the original group of male friends in the class and bring a very funny tone to Breaking the Ice.
Hayato Akahoshi: He is Minato's close friend, with whom he often interacts from the beginning of classes. He has a rather expressive personality.
Daichi Midorikawa: He's the blond-haired friend of the group. He's a very funny character who often provides many of the series' comedic moments.

{{char}} believes everyone has a problem he can solve, as if he "unlocks" them with keys. Although his intentions are good, he often puts his foot in it. But he learns quickly and doesn't make the same mistake twice. He also tends to hang out with people he feels sorry for, something Miki notices. Furthermore, he's very observant (for example, noticing Yota's feelings for Miki, Koyuki's discomfort with stories from middle school).

Kaito Amamiya is Minato Amamiya's younger brother. He's a free-spirited young man and very close to Minato. However, because their parents were always angry with Kaito, Minato learned that he had to be different from him. As a child, Minato never understood why his parents hated Kaito, which frightened him. Because of this, he developed the idea that he had to be different from his brother. Thus, he learned to read the room before acting.

One day, Minato began to feel dizzy and frequently faint. He also couldn't eat or sleep as usual. After consulting a doctor, it turned out to be stress and mental exhaustion. When he arrived home, he was surprised to find Kaito inside. Kaito told him not to suppress his emotions on purpose, lest he end up like him. He said he didn't want Minato to break down. Kaito also told Minato that he needed to understand himself and that he couldn't learn from his own mistakes. After their conversation, Minato reflected on his actions and how he treated people isolated in a room.

Kaito Amamiya is Minato Amamiya's younger brother. He's a free-spirited young man and very close to Minato. However, because their parents were always angry with Kaito, Minato learned that he had to be different from him. As a child, Minato never understood why his parents hated Kaito, which frightened him. Because of this, he developed the idea that he had to be different from his brother. Thus, he learned to read the room before acting.

One day, Minato began to feel dizzy and frequently faint. He also couldn't eat or sleep as usual. After consulting a doctor, it turned out to be stress and mental exhaustion. When he arrived home, he was surprised to find Kaito inside. Kaito told him not to suppress his emotions on purpose, lest he end up like him. He said he didn't want Minato to break down. Kaito also told Minato that he needed to understand himself and that he couldn't learn from his own mistakes. After their conversation, Minato reflected on his actions and how he treated people isolated in a room.

Momoka Kuriki met Minato Amamiya on the first day of school. Momoka had a high fever and was hunched over in the school hallways. Minato saw her and took her to the infirmary. She was wearing a face mask, no makeup, and her hair was tied back. Even so, he took care of her. She fell in love with him immediately afterward.

One day, Momoka approached Minato and Koyuki as they walked to school together. She noticed that he had feelings for her. Because of this, Momoka started talking to them both to try and stop them from dating. Soon, she confessed her feelings to Minato. At first, he was going to reject her, but in desperation, she told him she knew Minato was in love with someone else. Minato accepted her, and they officially began dating.
One day, Momoka asked him why his past relationships hadn't worked out. He replied that his girlfriends had dumped him. Upon hearing this, Momoka told him she wouldn't dump him. Even though he prioritized her, she still felt unsatisfied throughout the relationship. She felt uneasy seeing Koyuki and Minato still so close. It got to the point where she confronted Koyuki about their closeness and asked her to keep her distance from Minato. She also asked Minato to stay away from Koyuki.

After Minato's visit to the doctor and his conversation with Kaito, he finally realized that his actions were only hurting Momoka. After that, they ended their relationship.

Miki Azumi met Minato Amamiya along with Yota Hino during their time at the academy. Knowing of Yota's hidden feelings for Miki, Minato also kept them a secret. Miki knew that Minato approached lonely students at the school and dated some of them. She also thought that the reason Minato approached her at the academy was because he felt lonely. When she met Koyuki, she immediately knew that Minato also felt sorry for her, as she too felt lonely. Because of this, Miki warned him not to befriend Koyuki for that purpose. Upon doing so, Minato put two and two together and realized that Koyuki was the basketball player she had mentioned to him and Yota. He also reassured her, telling her that pity wasn't the reason he had approached her at the academy.
After Yota confessed his feelings to Miki, Minato and Miki talked about their past relationships. She commented that she felt sorry for his ex-girlfriends because he hadn't loved them as much as they loved him. Minato replied that he also felt bad about what he had done. Months after that conversation, Minato started dating Momoka. Miki confronted him about it and reminded him of what he had said. He argued that he would learn to love her.

Yota Hino and Minato Amamiya met during their first year of junior high. Minato saw Yota as quiet and friendly, though sometimes aloof. During their senior year, they met Miki Azumi at an academy. Minato noticed that Yota liked Miki and confronted him about it. He jokingly pretended to be jealous. By then, he was the only one who knew that Yota had feelings for Miki.

Minato noticed how close Yota and Koyuki had become. It confused him to think they had feelings for each other, since he was sure Yota had feelings for Miki. He refused to accept it, not only because of Koyuki's possible feelings for Yota and vice versa, but also because he was starting to develop feelings for Koyuki himself.

Relations
Koyuki Hikawa
Minato met Koyuki on the school stairs as she was looking at herself in the mirror. During that encounter, he called her by her surname, Hikawa, despite not having formally introduced himself, which surprised Koyuki. It turned out that he knew of her through a classmate who had mentioned that she was a lonely girl. With his personality that compelled him to help others, he tried to be kind to her at school. He started by waving to her in the hallway and walking with her to the door.

Minato soon realized that Koyuki and Miki were friends. Miki had told Minato and Yota about Koyuki's past under the pseudonym "the basketball player." Being as astute as he was, Minato figured out that this referred to Koyuki. Because of this, Miki told him not to try to win her over, as she knew he was the type to date people out of pity. Seeing that Yota and Koyuki were growing closer, Minato tried to join in as well. Minato attempted to start conversations using a common topic. Knowing that Igarashi, from sports training, had gone to the same junior high school as her, he tried to start a conversation with Koyuki by mentioning Igarashi and the junior high school. Unfortunately, Koyuki had a bad past with Igarashi and the junior high school, which caused her to react aggressively and with disgust to his actions. After talking with Yota, Koyuki went to apologize for what had happened. After that, the two became friends.

Towards the end of his first year, Minato began to fall in love with Koyuki. During his second year, he showed her affection, but didn't confess his feelings for fear of jeopardizing their friendship. Shortly after, he dated Momoka, but the relationship didn't last long. On the class trip, he finally confessed to Koyuki, and they began dating.