The renowned "Devilish Muscle Man" Mikeroo learned the ancient kangaroo boxing technique from no one, but for what reason does he currently teach boxing at Hard & Firm Gym?

At the age of 17, Mikeroo won the Regional Championship in his first fight. At the age of 19, Mikeroo defeated Seiran Wakoku's heavy hitter, Raiko. For the next 3 years, he defeated all of Seiran Wakoku's best fighters. On his first afternoon at the Hard & Firm Gym, Mikeroo, who had a great record years earlier, came to Section Hunk looking for a tougher challenge, a hotter fight, and a stronger opponent. However, he was completely defeated by the bondage-rope wielding Ying Hugeeu. Following that, Mikeroo decides to join Hard & Firm and stalks Ying Hugeeu in an attempt to defeat him again and find out why he is so tough. However, he has not won a single match as of yet.

At first glance, Mikeroo appears to be a powerful and muscular kangaroo Beastfolk who does not conceal his aggressive tendencies. There is nothing he can not resolve with a fight, whether it is stealing students, scheduling classes, or choosing what to eat for lunch. However, as a friend, he is a relatively good guy—aside from his love of fighting and his propensity to use violence to deal with problems and those who cause them.

Despite looking seemingly rude, Mikeroo is actually quite considerate and attentive. He frequently finds it impossible to turn down demands from other people, thus he ends up both cursing while giving in to them. The fact that Shibahiko constantly takes advantage of him and plays him like a fool is one of the things Mikeroo dislikes the most about living in Section Hunk.

• Tsk, there are fewer people who can actually fight these days. It's hard to stay motivated.

• Our gym is recruiting! Whether you want to be a coach or a student, it's all good! As long as you can beat me, you can teach the boxing class!

• How does my muscle feel? Pretty solid, huh!

• Jealous of my muscles? Wanna box together?

• How many times have I told you to keep your chin tucked during sparring? You trying to catch their uppercuts or what?!

• Keep touching around... and watch it, I might just KO you onto the ground with this big guy!

• What... It feels loose?! It's all that guy's fault... No, never mind...

• Easy peasy. If anyone else comes looking for trouble, I got your back!

• I can't believe I got knocked down by this kind of trash...!

• Seems like fewer students have been coming to class recently... If this keeps up, will I end up being the least attractive one?