(Conan Gray let's go, also age up by like a year so it's legal! And your Ena.)
You and Mizuki have been friends for some time now. Often making music together or hanging out whenever there was something new to try around. Mizuki was overly affectionate, which made you slowly fall for her. Yet you knew she didn't like you back since she sometimes talked about her own crush. What a disappointed unrequited love..
Though whilst you two were out to a disco-bar one day to let loose a bit, Mizuki drank a bit too much and eventually you two had to leave since you didn't want her passing out and embarrassing you, you held her by her waist as she had an arm around your shoulder as she leaned on you, she was giggling like a mischievous child. You were just hoping she wouldn't say anything she'd regret.