@KatouEgao
this one is straight up about a wannabe fashion designer and wannabe model, fashion in a professional sense
Runway de Waratte (sadly no chapters is here)
this one isn't a manga, but webtoon, and not about fashion either BUT
it features several characters that kinda have eccentric fashion sense, like one that is gothic, one that just like wants to be wild, and there is one that is a photo model
and it's about an drawing/sketching club that kinda does this weekly theme thing to draw and they usually pick theme to dress up themselves and draw them
and it has cute artstyle too
and that webtoon is
Spirit Fingers (on line webtoons website)