Karate Shoukoushi Kohinata Minoru: A karate manga w/ a long-ass title

Karate Shoukoushi Kohinata Minoru 
A one of a kind manga. Just what I wanted. The story starts out w/ the fail at life protagonist and ex-gymnast helping his one friend who is popular and pretty and talented at gymnastics, practice. Then in comes the masked hero of the story who goes around beating up members of other clubs for kicks and has insanely sharp teeth and weird taste in food. So afterwards, the mask comes off and Mutou decides to go peeping since he spots the lights still on at the gymnastics club room and goes to see what's up. Then naturally the protagonist gets a beating from his jealous sempai from being too close to hot girl Nana. Nana-chan tries to get the sempai to stop and tells them off, but they get piss and attempt to rape her. At this point, Minoru gets pissed and begs to get beaten even more, so leave Nana-chan alone or something along those lines. So, then Mutou gets pissed and knocks all the guys out. Next thing he knows Minoru is in the the second karate club room and is coerced into joining by the squinty-eyed captain Minami, who somehow has a black belt and as of chapter 69, has not been seen fighting seriously even once*edit*actually he can fight well, just that he'd rather not and his health/luck is not very good.

Characters in order of 1st appearance(in progress up to 35):
Male: main-Kohinata Minoru(protagonist, former gymnastics, karate), Mutou Ryuuji(sempai, mentor), Minami Hiroki(karate captain, suffers from hemorrhoids), Hayama Kentarou(karate, roommate, friend), Itsuki/Ibuki Kengo(karate, part timer), Mamiya Seiji(karate, friend)
side recurring or more than 1 chap. appearance-Tamura Keita(judo captain), Shimura Tomo(gymnastics captain), Itou Kiyoshi(main karate captain), Mamiya Kiichi(kendo captain), Osaki Tsuyoshi(sumo captain), Tadokoro Makoto(kendo vice captain), Akita Mitsuharu(Musashino Dojo Head Instructor), Morisawa Yuuya(mixed martial arts, hentai)
side nonrecurring/1 chapter or 1 brief fight-Tachiyama Yoshiaki(judo OB), Usami Shunta(taekwondo), Takenaka Hisashi(karate), Sakurai Kazuhiro(judo)
Female: Misaki Nana(friend, gymnastics), Kou Haruka(taekwondo captain), Takakura Akiko(naginata), Endou Nozumi(naginata captain), Endou Chiyo(naginata instructor/sensei, obaachan, on Reinan's board of Directors)

So as the manga progresses Minoru slowly gets stronger and his looks change drastically.


SPOILER ALERT: There will be a gay rapist character introduced who goes around raping guys wearing a mask and later joins the club after he gets a beating from you-know-who and , who takes a shine on Minoru, much to his and my own disgust. Male on Male rape is not cool unless it's bara, in which case it's not.

Two men fighting and pinning each other down itself is/or looks pretty gay, so it's not surprising that some people who practice martial arts are gay too, but to use it to sexually assault someone is ew just no. It's an insult to people who actually practice martial arts for purely because the like it and/or enjoy fighting someone and not use it for sinister acts. And it's gross when two people are fighting a one gets pinned down and the other gives him/her a lewd gaze, creepy.

Moving on to the million yen question: What's the relationship between Mutou and Haruka?