This is a fan-made manga i've started working on few time ago

Subject: Yui Tisumi, a 18 years old duelist whose skills are limited, upset towards that, she decides to enhance her own skills with her own will and efforts, however, once she got engaged in a duel with Melissa, things have changed for her, by obtaining a new power, she aimed at trying to master that power, as well, getting better in Duels.