When Satoru Gojo first met Uchiha Mu, he thought she was a total chuunibyou, not to mention a complete airhead!
After all, the surname Uchiha sounded incredibly chuunibyou, and she was carrying a fish basket smeared with red fluorescent powder. She also had a bizarre fishing rod that was clearly fitted with LED lights. Acting suspiciously in a dark alley, she repeatedly whipped a metal turtle on the ground with the "string" on her "fishing rod." Her manner and movements were like those of some bizarre creature.
But somehow, it was as if she had been born to counter him. The Limitless seemed to give her an allergic reaction. The moment they met, she tied him up in a tortoise-shell bondage pose. Then, like the Calabash Brothers rushing to save their grandfather, she hung Suguru Geto and Yaga, who had hurried over after hearing the commotion, from a tree. Wielding her LED fishing rod, she "interrogated" them about what criminal gang they belonged to and tried to wipe out their entire hideout...
Though they were all eventually tied up in a row and hauled back, she was still tricked into coming to the technical college and became their companion. In the end, it was a blessing in disguise.
Suguru Geto had thought his new classmate was just a troublesome, brain-damaged little brat, on par with Gojo... (100 words omitted here).
But before long, the three of them, birds of a feather, formed the strongest trio of scumbags in history. They supported one another and, along the way, became each other's salvation...
Not a multiple-love-interest story. A love triangle. I'll write what I can, and if I can't, it'll have an open ending. Enjoy however you like.
Theme: Love others, and love yourself.