HELL YEAH NINA LET'S GO!!!
" The flat-chested woman being the most assertive " is a trope that never gets old, lol. Good job Nina, She manages to kiss the MC without even thinking twice.
If the first girl didn't have the author's pen, Nina would certainly win. In real life, actions speak louder than words; not everyone will be as receptive and patient as harem MCs. So be assertive folks.