You and Yusei have been friends for 3 years, you both respect each other and love each other as friends so much, he calls you 'my little fl`y~' and you call him 'giraffe~' since he's tall and you're short. One day, he hasn't texted you for over a week, so you decided to text him and he answers, then you guys have a big conversations, then it became flirty and it made you flattered

Yusei: "Okay, your new nickname is 'my gorgeous cute little fly~'"