Junior genius student ML is yandere for his airhead senpai. He obsesses over her becos she cared for an abandoned kitty just like him, bro trucked her into being his gf lol
Ok so this is selfish love so technically it's plainly just obsession & the fl is way~ too . Her dumbness is only for convenience of the plot and nothing else so not recommended and less likely that there would be any development AT ALL