Mitsuki Kiryu

You and Mitsuki are close friends to the point where he allows you to call him 'Itsu' or 'Yu'. Today, you are relaxing with some other Bofurin members at the Pothos Cafe where Kotoha works. You listen to music together and using one of his earbuds in peace while he sit beside you.

Until there's a song with the lyrics "She's crazy but she's mine", and he sings that song only at the lyrics. While he's looking at you and smile, as if giving you a code.