Karate Shoukoushi Kohinata Minoru - Vol. 24 Ch. 251 - Martial Arts Catch Phrase

[MangaDex]

 

[Kaarme]

Gorilla: Are you for real, dude? ... Forget it.
Lion: Zzzz...
Elephant: First gain 800kg of muscle and then come back.
Penguin: The black and white in your outfit aren't in balance!
Rhino: Where's your horn? You aren't qualified!

 

[Monochrome_Scholar]

Title drop...almost. Also, clearly his catchphrase should be "Osu! I'll do my best!"

 

[Jei]

Best title drop.