Yamaguchi is Morinaga's classmate and friend. He occasionally assists with projects.

yamaguchi
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Morinaga Tetsuhiro
Supporting
Occupation: N University Agricultural Science Masters ProgramHometown: Fukuoka PrefectureAge: 23Birthday: July 5 (Cancer)Blood type: OHeight: 187 cmWeight: 67 kgFavorite color: Likes warm colorsFavorite food/Disliked food: Nothing really. He eats anything...
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Tatsumi Souichi
Supporting
Age: 25Birthday: August 2Zodiac: LeoBlood type: AHeight: 178 cmWeight: 58 kgOccupation: N University Agricultural Science Doctorate ProgramHometown: NagoyaSlogan: "Ill tell my dreams. To discover the gay gene, it is to wipe homosexuality from the world!"F...
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Hiroto
Supporting
Tetsuhiro Morinaga best friend, works in a gay bar,same Morinaga frequented, provided you are giving advice on his relationship with Tatsumi-sempai, and he was the one who gave the drug to Morinaga, with which the story began Koi suru Boukun. It is also a...
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Isogai Taichirou
Main
Occupation: Salary manBirthday: 1st February (Aquarius)Blood type: BHeight: 175 cmWeight: 58 kgBest friend and colleague of Kurokawa. Single. Original character from the manga Challengers. Makes an appearance in The Tyrant Falls In Love in Volume 3....
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Kurokawa Mitsugu
Main
Occupation: Salary manBirthday: 10th May (Taurus)Blood type: AHeight: 176 cmWeight: 60 kg Main character in Challengers...
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Masaki Junya
Supporting
Masaki Junya was Morinaga Tetsuhiros first love. He was best friends with Morinaga Kunihiro in middle school and high school. He was secretly in love with Kunihiro. ...
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Matsuda
Supporting
He is Takayas classmate and very interested in Lilim, but also has a crush on Miyu....
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Morinaga Kunihiro
Supporting
Kunihiro is Tetsuhiro Morinagas older brother. He was best friends with Masaki Junya in middle school and high school. He works in Fukuoka....
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Tatsumi Tomoe
Main
Age: 18 yearsOccupation: W-university Engineering studentBirthday: 8th February (Aquarius)Blood Type: 0Height: 165 cmWeight: 49 kgMain character in Challengers, genius when it comes to robotics etc; but kinda naive person....









