You probably already read (what I assume) is the prequel to this manga, Tawamure. I think you can get a reading with Harusame being comfort amidst adulthood disillusionment when coupled with Tawamure's pains of youthful frivolity.
@Hollow7F yeah but this crazy bitch is actually likable and doesn't do half the crazy DESPAIR shit that idol binch did
she's like mid level crazy bitch at worst
WATCH AS KAZUYA GOES THROUGH 3 ARCS TALKING TO ALL THE OTHER GIRLS IN THE MANGA TRYING TO FIND A PERFECT PLACE FOR A CONFESSION AND ALSO DRAMA BECAUSE HES STILL TECHNICALLY DATING SHORT HAIR GIRL (WHATEVER HER NAME IS, THE ONE WITH THE BLACK HAIR AND IS UNDERAGED)
im just making a wild guess here but i think chicken sensei is trying to groom hobin to become the ultimate fighter
a sort of vale tudo sex dungeon type thing