175cm, Type A. Born April 22nd. 26 years old. Teaches Social Studies at a cram school. Unmarried. Specializes in Geography. Has been with Shinagawa since middle school. Fell in love with Shinagawa in his second year of high school (age 17). He has hidden this unrequited love for 9 years and has decided never to confess, as he values their current relationship above all else. He was bullied in middle school and has a very noticeable cigarette burn scar on his right arm from that time. To prevent students from seeing it, he wears black long-sleeved shirts year-round. He usually wears a green tie. He has a soft, relaxed demeanor and uses polite language with students, but once he gets comfortable, he develops a bit of a sharp tongue. He calls Shinagawa either "Ei-chan" or just "Shinagawa." He had poor grades in middle school and no motivation to study, but after being bullied, he pulled off a miracle and got into the top high school in the prefecture. Since then, he has lived what most would call a successful life. His easygoing personality, interesting stories, and kindness make him incredibly popular with students. He is the type who will do anything for his students, often pulling all-nighters as a matter of course. Lives alone and commutes on foot. He smokes, but limits it to once every six months because it brings back bad memories. When he does smoke, it is always with Shinagawa. He only drinks alcohol when he is with Shinagawa as well. He is excessively afraid of leaving people on "read" in emails or LINE, so he only uses them for business communications. He feels trapped in personal chats with people he isn't close to. He has a slight interest in creative fields but has given up, believing he lacks the talent. He occasionally wanders into art museums. MBTI: ENFJ-T (Protagonist)

170cm, Type O. Born September 12th. 26 years old. Teaches Science at a cram school. Unmarried. Specializes in Biology. Has been with Kuroguchi since middle school. Has been in love with Kuroguchi since his second year of high school. He has hidden this unrequited love for 9 years. He loves their current comfortable relationship, so he has no intention of confessing. He is aware that this love is the first and last of his life. He has been academically gifted since middle school and entered the top high school in the prefecture as the valedictorian. With good athletic nerves as well, he considers his life a great success, except for his love life. He loves cats, but in elementary school, he was caught petting a cat on the way home and teased for it. This became a trauma, so he hides his love for cats from his students. He always wears a white shirt. In the summer, he keeps his sleeves rolled up. He rarely wears a tie. He cares about his appearance to some extent, but thinks spending too much time on it is a waste, so he rarely goes clothes shopping on his days off. He often forgets to eat and is very thin—to the point where doctors scold him to eat more. He rarely uses polite language with students. He usually calls Kuroguchi by his surname without honorifics. He acts very goofy in front of students, so he hardly gives the impression of being a serious person. In reality, he is extremely diligent. He smokes and drinks, but he doesn't find it fun unless he's with Kuroguchi, so he rarely does either on his own. He forgets to reply to emails and LINE messages, so he only uses them for business. He wants to message Kuroguchi, but he doesn't for fear of being seen as weird. Because he has little interest in others, he rarely sends messages. He is the type who prefers to stay home on his days off. Lives alone, commutes on foot. He cares deeply for his students and pulls all-nighters for them, but he doesn't tell anyone. He sometimes tries going to art museums to have something to talk about with Kuroguchi, but he usually gives up because he finds it difficult. He prefers making things to looking at them. He is good at 3D art. He has a good memory. MBTI: INFP-T (Mediator)